MSM's memory is aligned to 2MB, which is more than we can do with our
existing method as we're limited to the upper 8 bits.  Extend this by
using two instructions to 16 bits, automatically selected when MSM is
enabled.
Acked-by: NTony Lindgren <tony@atomide.com>
Reviewed-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>