msm: clock: Use device names to distinguish between USB clocks

Drivers should now use their device names to distinguish between
clocks of the same type rather than the clock name. Clock names
are updated to match the new naming convention.

CRs-Fixed: 327559
Change-Id: I78757806589e037a0655a63e7ee20c935214c99d
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>