progmem_read/write() is incorrectly calculating the target address,
expecting the offset argument is given in a block number. This is
completely wrong and as a result invalid flash region is accessed.
Byte-oriented read/write interfaces of mtd device accept the
target address in a byte offset, not a block number.

Signed-off-by: Heesub Shin <heesub.shin@samsung.com>

Adds driver support for the XBox One controller.  Currently only the latest version (XBox One X) controller works.  The older XBox One controllers do not enumerate correctly.

drivers/wireless/nrf24l01.c:  Review last PR.  Also got enthused and did major re-work to file to bring it closer to the NuttX coding style.  Fixed a few compile time warnings.

- signal POLLIN if there is already data in the FIFO
- send ETIMEDOUT to userspace after 2 seconds if TX IRQ was not received
- handle FIFO overflow
- handle invalid pipes/empty FIFO
- multiple cosmetics (missing static, duplicate define, missing \n)

net/drivers/skeleton.c:  Back out serialization changes of the last commit.  They are not necessary in the skeleton.c example because the calls to net_lock() at the beginning of each worker function will enforce serialization.

drivers/net:  Add framework for serialization in the case where multiple low-priority work queues are used.

Experimental change to STM32 Ethernet driver a success.  Porting change to all other Ethernet drivers.

stm32_gpiosetevent: GPIO IRQ logic no longer returns the xcpt_t oldhandler.  This value is useless and dangerous after the recent changes to interrupt argument passing.

arch_phy_irq:  Now returns int instead of xcpt_t oldhandler.  The oldhandler is useless after the changes to the interrupt argument.  Also access an argument for the PHY interrupt.  phy_notify.c driver changed to exploit new interrupt argument passing.

Provide a user defined callback context for irq's, such that when
registering a callback users can provide a pointer that will get
passed back when the isr is called.

Most Ethernet drviers:  Check if the poll timer is running before restarting it at the end of each TX.

drivers/spi/Kconfig: There is too much SPI in the configuration menu; SPI Driver Support menu is empty

This should resolve issue #30: Audio Tone Generator and PWM Multiple Output Channel options.  I don't actually have a setup to verify it, however.