msm: rotator: Register device with clock driver and rename clocks

Rename the clocks per the new naming convention under which
similarly named clocks are distinguish between using their
associated device's name and ID.

Change-Id: Ie9fe3c32325b6045f89c650183bbec8b4c13ccb0
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>