drm-amdkfd-next-2018-03-11

Use __u32 and __u64 instead of POSIX types that may not be defined
in user mode builds.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>