Add support for Micron MT25Q series MT25Q128

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

commit b2ea300b broke the STM32L4 port for people not using the L496xx or L4A6xx.  That was because stm32l4_sdmmc.h is included from the stm32l4.h global header, and this header fires an #error for other chips.  I see that ALL stm32l4 have the same SDMMC except the stm32l4x2, which has none.

tools/:  configure.sh and configure.c should redirect stdout to /dev/null but should not suppress stderr output.

tools/configure.sh:  Another fix for the script.  The last change only worked for Windows Cygwin; for Linux, it needed to remove some additional things from the defconfig file.

stm32_hrtim: add support for capture, chopper, deadtime and dump registers

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

tools/configure.sh: Add special support so that you can start with a a windows native configuration and install on a different host (and vice versa).

compiler.h, limits.h, types.h:  Update SDCC/z80 files to include support for long long, inline, __FILE__, and __func__.

    configs/z80sim and xtrs:  Serial driver lower halfs ioctl methods should return a negated errno value, not set the errno variable.

    drivers/wireless:  CC1101 driver not permitted to set errno.

    drivers/sensors:  LIS331DL driver not permitted to set errno.

    drivers/lcd: ILI9341 initialize method not permitted to set errno,

    drivers/serial: 16550 UART driver IOCTL method must not set errno; it must return a negated errno value.

    STM32, STM32 F7:  LTDC and DMA2D drivers are not permitted to set the errno.

    SIM LPC31xx:  Serial and console drivers are not permitted to set the errno.

    SAMv7, STM32, STM32 L4:  DAC and ADC drivers are not permitted to set the errno.

    psock_close() and net_close() are internal OS functions and should not set the errno variable.

    psock_ioctl() and netdev_ioctl() are internal OS functions and should not set the errno variable.

    net_dupsd() and net_dupsd2() are internal OS functions and should not set the errno variable.

    net/ and fs/: net_vfcntl(), file_fcntl(), file_dup(), and file_dup2() are all internal OS interfaces and should not modify the errno value.

    net/: psock_recvfrom() is an internal interface and should not set the errno nor should it be a cancellation point.

    net/: psock_accept() is not a cancellation point.

    net/: psock_getsockopt() and psock_socket*9 are an internal interfaces and should not set the errno.

    net/: psock_getsockopt() is an internal interface and should not set the errno.

    net/: psock_listen() is an internal interface and should not set the errno.

    net/: psock_connect(( is an internal interface and should not set the errno nor should it be a cancellation point.

    net/: psock_bind() is an internal interface and should not set the errno.

    net/: psock_accept() is an internal interface and should not set the errno.

net/: Versions of psock_send() and pock_sendto() should not set errno.  That is taken care of at a higher level in the send()/sendto() implementation as appropriate.

syslog_console.c: fix typo

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

drivers/syslog:  syslog internal functions should not set the errno variable:  ramlog_putc(), syslog_dev_putc(), syslog_dev_write(), syslog_force().

fs/vfs:null check for path on open and buf on write

Null path check is depend on CONFIG_DEBUG_FEATURES and CONFIG_DEBUG_ASSERTIONS, added null checking so it's always performed
Added null checking on buf for write()

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

Add support for an in-memory routing table cache in order to improve performance when the routing table is retained in a file.  The cache holds the most recently used routing table entries and so can eliminate some file access.

Squashed commit of the following:

    net/route:  Flush in cache when any entry is deleted from the routing table.  When a router matching an IP address is found, add the routing table entry to the cache.

    net/route:  Add utility functions to manage an in-memory cache to improve performance when use a file-based routing table.