regulator: move the rpm-regulator-smd driver to drivers/regulator directory

Move the rpm-regulator-smd driver from the arch/arm/mach-msm
directory into the drivers/regulator directory.  Also rename it
from rpm-regulator-smd.c to rpm-smd-regulator.c so that it
matches the naming scheme of the other regulator drivers. Moving
this driver out of the arch/arm/mach-msm directory allows it to
be shared with architectures other than 'arm'.

Also move the header file from the arch/arm/mach-msm/include/mach
directory into the include/linux/regulator directory.  Moving the
header file requires updating all drivers which include it.

Change the compatible property values so that they match the new
driver name.

Change-Id: I20f2a4503c198ba9d1d04a77b03411dcc98e8aa1
Signed-off-by: David Collins <collinsd@codeaurora.org>