Patch brings strtol() and related functions more conformant with POSIX.  Corner cases like strtol(-2147483648, NULL, 10) now pass clang -fsanitize=integer without warnings.

typos

Change the way to configure quadrature encoder prescalers.

sem_wait() and sem_trywait() no longer modify the errno value UNLESS an error occurs.  This allows these functions to be used internallly without clobbering the errno value.

LM32: Move interrupt definitions from common irq.h to lm32/irq.h.  Remove unused misoc_uart.c and .h

STM37xx PWM:  Add PWM driver support for STMF37xx.  The changes have been tested successfuly for TIM4 and TIM17 (different IPs).

STM32F7 SD/MMC driver depends on CONFIG_SDIO_DMA which is only defined in stm32/Kconfig.  Changed to CONFIG_STM32F7_SDMMC_DMA and defined in stm32f7/Kconfig.

stm32f7 important usb fixes

LM32: Correct some assembly language interrupt handling issues.  Now the basic port seems functional.

Fix armv7r

Signal sent from work_signal() may interrupt the low priority worker thread that is already running. For example, the worker thread that is waiting for a semaphore could be woken up by the signal and break any synchronization assumption as a result. It also does not make any sense to send signal if it is already running and busy. This commit fixes it.