powerpc/powernv: Cleanup unused MCE definitions/declarations.

Cleanup OpalMCE_* definitions/declarations and other related code which
is not used anymore.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Acked-by: Benjamin Herrrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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

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

diff --cc arch/powerpc/kernel/asm-offsets.c
Simple merge

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

diff --cc arch/powerpc/platforms/powernv/opal.c
Simple merge