powerpc: Remove function descriptors and dot symbols on new ABI

ABIv2 doesn't have function descriptors or dot symbols. One
new thing it does add is a function global and a local entry
point, so add that to our _GLOBAL macro.

Signed-off-by: Anton Blanchard <anton@samba.org>

diff --cc arch/powerpc/include/asm/ftrace.h
Simple merge

diff --cc arch/powerpc/include/asm/linkage.h
Simple merge

diff --cc arch/powerpc/include/asm/ppc_asm.h
Simple merge