powerpc/perf: Power8 PMU support

This patch adds support for the power8 PMU to perf.

Work is ongoing to add generic cache events.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/perf/Makefile

@@ -4,7 +4,8 @@ obj-$(CONFIG_PERF_EVENTS)	+= callchain.o
 
 obj-$(CONFIG_PPC_PERF_CTRS)	+= core-book3s.o
 obj64-$(CONFIG_PPC_PERF_CTRS)	+= power4-pmu.o ppc970-pmu.o power5-pmu.o \
-				   power5+-pmu.o power6-pmu.o power7-pmu.o
+				   power5+-pmu.o power6-pmu.o power7-pmu.o \
+				   power8-pmu.o
 obj32-$(CONFIG_PPC_PERF_CTRS)	+= mpc7450-pmu.o
 
 obj-$(CONFIG_FSL_EMB_PERF_EVENT) += core-fsl-emb.o