msm: ipa: Fix to race condition proxy clock voting

Added code changes to fix the race condition during
proxy clock voating in IPA.

Change-Id: I1fee17836bf58d25f461643ea1e60bcd06182372
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>