CMSIS-NN: Use __RESTRICT instead of restrict keyword
CMSIS-NN: Use __RESTRICT instead of restrict keyword

CMSIS macro __RESTRICT is used to enable compiling with
C++ modes as well.

Change-Id: I25bed121e4542b6e4697915f8c3cc75611a0b16c

ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5,JonatanAntoni/CMSIS_5,JonatanAntoni/CMSIS_5,ARM-software/CMSIS_5,ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5,ARM-software/CMSIS_5,ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5,ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5