ASoC: msm8x16: remove multiple instances of mux ctl reg remap

The speaker and mic mux configuration registers are io remapped
and unmapped at multiple instances in the code.
Remove the multiple instances of io remapping and unmapping of
these registers by doing them only once at the probe and
remove function.

Change-Id: If582e52744e93d8c11d0aefa82043dd52558e648
Signed-off-by: Aravind Kumar <akumark@codeaurora.org>