perfevents: Add support for Scorpion performance monitors.

This commit adds support for performance monitors provided by
Scorpion and ScorpionMP processor to perfevents.

Change-Id: I1796db44d486a3c94b02c09c628689d2afc5ffae
Signed-off-by: Sheetal Sahasrabudhe <sheetals@codeaurora.org>
(cherry picked from commit 1e6b885dcf3aa33bc2ab6bf2997f497abbcd95ce)

Conflicts:

	arch/arm/kernel/perf_event.c