drm:msm: fix deadlock in sde rsc client destroy api

The sde rsc client destroy API calls the state update
within mutex lock if client is not in IDLE state. The
state update API also tries to acquire same mutex
lock and causes the deadlock. This change fixes the
deadlock within rsc client destroy api.

Change-Id: Ic4e0ca1de56eb7c288c5df096b7faf0c04ec1fad
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>