arm: common: CP register access tool for Read/Write to CP registers

The tool can be used to read/write to CP registers by
passing the CP parameters through /sys interface. SMP
support added.

Change-Id: I01d3621f2b6f17d959a237d207b817992404ef88
Signed-off-by: Suren Eda Naarayana Kulothungan <sedanaar@codeaurora.org>
(cherry picked from commit c399b9755096e95036362f00f819c28650eb1a10)

Conflicts:

	arch/arm/Kconfig
	arch/arm/common/Makefile