ASoC: wsa881x: avoid regcache_sync() during playback

During playback device is already in UP state so no need to
call regcache_sync() function again. Fix this issue by checking
clk count and call only regcache_sync() if clk count is zero.

Change-Id: I1662567176e4c576403df19388414ed4bfb19bad
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>