wcnss: avoid msleep after WCNSS power state check

Move msleep() call to before WCNSS power check to avoid
WCNSS power state change during the 50 msec sleep.

Change-Id: I5adcaf82395dea2454f3059fb09363e4a5e106ae
CRs-Fixed: 717927
Signed-off-by: Anand N Sunkad <asunka@codeaurora.org>