msm: clock-8974: Add support for the audio block remapper clock

The OCMEM driver needs to configure a block remapper in the LPASS
subsystem. To access this, the audio_wrapper_br_clk needs to be on.
Add support for this clock.

Change-Id: Id6e3664b2b600e7d3b27a6d5f6e3eec730919a55
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>