powerpc: Remove dot symbol usage in exception macros

STD_EXCEPTION_COMMON, STD_EXCEPTION_COMMON_ASYNC and
MASKABLE_EXCEPTION branch to the handler, so we can remove
the explicit dot symbol and binutils will do the right thing.

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

diff --cc arch/powerpc/kernel/exceptions-64e.S
Simple merge

diff --cc arch/powerpc/kernel/exceptions-64s.S
Simple merge