include: uapi: update headers for upstream compliance

Fix uapi headers to work with KERNEL_HEADER_TEST and UAPI_HEADER_TEST.
Use __uX instead of uintX_t.
Use __sX instead of intX_t.
Use _Bool instead of bool.

Change-Id: I8c12efb728081716e49aea294f65ddfbae437267
Signed-off-by: Vignesh Kulothungan <vigneshk@codeaurora.org>