Fix signal handing for smp

* sched/signal: Remove SMP related logic in sig_dispatch.c

    This change prevents from a deadlock in up_schedulesigaction.c
    where inter-CPU signal handling is actually implemented.

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

* arch/arm/src/armv7-m: Fix signal handling for SMP

    In previous implementation, signal handling for SMP was incorrect.
    Thus, for example, if an inter-CPU signal happened an incorret tcb
    was signaled and caused ASSERT().

    This change fixes the issues and works for both inter-CPU signal
    handling and signal handling on the same CPU.

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

Approved-by: Gregory Nutt <gnutt@nuttx.org>

configs/flipnclick-pic32mz and -sam3x:  Generalize naming.  HiletGo is one SSD1306 LCD, but the logic should work with any SSD1306.  Naming need to be generalized to SSD1306 to make this reusability clear.

Added support for LIS3DH accelerometer sensor.

* Added support for LIS3DH accelerometer sensor.

* Fix line length

* Fix more line lengthts

Approved-by: Gregory Nutt <gnutt@nuttx.org>

net/tcp:  Fixed bad return value handling in psock_tcp_send().  send() expects psock_tcp_send() to return a negated errno value, not -1 with the errno set (GN: I added same change for tcp_send_buffered.c which has the same issue as tcp_send_unbuffered.c)

SAMDL DMA fixes and experimental SPI support

* SAMDL: Fix DMA controller support

* SAMDL: Added experimental DMA support to SPI driver. spi_exchange() uses a pair of DMA channels for TX and RX

Approved-by: Gregory Nutt <gnutt@nuttx.org>

disable LPC17 FDR when not used (second fix)

if a boot loader sets the fractional divider (FDR) the baud rate in
nuttx will be wrong (multiplied by this fraction).

This also has to be added to lpc17_lowputc.c

Unfortunately the constant used for shifting the bits was wrong in the header file, so it took some time to realize this...

Approved-by: Gregory Nutt <gnutt@nuttx.org>

Master

stm32_hritm: add interface to set timer frequency, fix slave timers reset configuration, change POWER_INFO to TIMER_INFO

Approved-by: Gregory Nutt <gnutt@nuttx.org>

SAMDL: Added loading factory USB calibration data from NVRAM

Approved-by: Gregory Nutt <gnutt@nuttx.org>

SAMDL: Fix EIC interrupt edge sensitivity for pin numbers > 8

Approved-by: Gregory Nutt <gnutt@nuttx.org>

SAMDL: Added FDPLL clock support. Fixed sequence of OSC32K calibration setup

* SAMDL: Added FDPLL clock support. Fixed sequence of OSC32K calibration setup

* fixed code style

Approved-by: Gregory Nutt <gnutt@nuttx.org>

    configs/flipnclick-pic32mz:  Add an nxlines configuration for use in testing the custom HiletGo Click board.
    arch/mips/src/pic32mz:  Correct some SPI-related typos.  configs/flipnclick-pic32mz: Finishes integration of HiletGo OLED. drivers/lcd:  Finish support for HiletGo OLED.
    drivers/lcd:  Add configuration support for HiletGo OLED.  configs/flipnclick-pic32mz:  Add board support for HiletGo OLED.

arch/mips/src/mips32:  In up_idle, the kludge that was conditionally enabled if the work queue was enable appears to be needed even when he work queue is not enabled on the PIC32MZ.

arch/mips/src/pic32mz: Fix some typos in debug instrumentation in pic32mz-gpio.c; fix some types releated to UART5 configuration in pic32mz-serial.c.

configs/flipnclick-pic32mz/nsh:  Switch serial console to UART3.  There is some problem with the UART4 RX pin documentation or configuration.

disable LPC17 FDR when not used

* disable LPC17 FDR when not used

    if a boot loader set the fractional divider (FDR) the baud rate in
    nuttx will be wrong (multiplied by this fraction).

    So if it is not used, it should be disabled.

    LPC176x docs say:
    "
    DIVADDVAL Baud-rate generation pre-scaler divisor value.
    If this field is 0, fractional baud-rate generator will
    not impact the UARTn baudrate.

    MULVAL Baud-rate pre-scaler multiplier value.
    This field must be greater or equal 1 for UARTn to operate properly,
    regardless of whether the fractional baud-rate generator is used or not.
    "

    So DIVADDVAL is set to 0 and MULVAL is set to 1.

* symbols found and added

Approved-by: Gregory Nutt <gnutt@nuttx.org>

sched/task:  It is not appropriate for logic in task_exit() to call the new version of this_task().  sched/irq:  Remove redundant fetch of CPU index; configs/sabre-6qguad: update README.