msm: vidc: Ignore clock reset when bcr reg is not present

Clock reset is not needed for all targets. For targets
which do not have the block reset register, there is no
need to reset the core clock.
The change handles the above case and avoid considering
it as an error case.

Change-Id: I3d1fdd6c60b6968ae79c59a05f4cfc4e7a9cbb64
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>