Add a start time to sem_tickwait() to account for any elapsed time before the timer is actually started

sem_tickwait():  Add a new, non-standard function to perform timed semaphore waits.  It is functionally equialent to the standard sem_timedwait(), but more efficient for use in higher performance device drivers.  Requested by Max Neklyudov

sem_tickwait():  Add a new, non-standard function to perform timed semaphore waits.  It is functionally equialent to the standard sem_timedwait(), but more efficient for use in higher performance device drivers.  Requested by Max Nekyudov

Change the name of the local variable sigset to set to prevent name collisions with the function of the same name

Eliminate `sigset' shadow warning

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>

[drivers/serial/uart_16550] Typo fix in data bits setup

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>

Make FTMAC100 independent from board-specific low-level functions. Typo in net/skeleton.

[drivers/net/ftmac100] Remove private board-specific interrupt configuration calls. Configure Mode/Level outside of the driver scope.

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>

[sched/pthread/pthread_kill] Add missed header for enabled CONFIG_SCHED_HAVE_PARENT

Signed-off-by: Anton D. Kachalov <mouse@yandex-team.ru>

16550 UART Driver: Add a configuration option to indicate the the THR empty bit is inverted.  This is the the case for the moxART SoC.  Based comments from Anton D. Kachalov

Sporadic: This interim version works pretty well, but the things that I had to do were nasty and mean that -- sigh -- there will be another redesign coming