perf vendor events: Support couple more POWER8 PVRs in mapfile

Add support for Power8 PVR 004b0201 for tuleta and 0x004d0200 for
firestone.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
CC: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/n/tip-wr6rf3d3vvggy8180ftt2ro1@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>