Use __asm__ instead of asm in public libc headers

If compiling userland code with -std=c99, the current header produces an
error. The content of this header originally is a kernel internal header,
where asm() is acceptable. In a header visible to userland, this should be
__asm__ instead.

Change-Id: I4d3188dd96f7836148ca89f5053d0389dd459d6e
1 file changed