ARM: Add support for 64 bit register reads/writes

Add macros to read and write to 64 bit registers.

Change-Id: Id45d4086aa148ba96df3987c3341c133f1c56541
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Signed-off-by: Iliyan Malchev <malchev@google.com>

Conflicts:
	arch/arm/include/asm/io.h
1 file changed