soc: qcom: rpmh-rsc: Add delay during waiting for TCS complete

The RSC channel switch in certain cases may take more time
to complete at RPMH end.

Add delay of maximum 100usec.

Change-Id: I65862ad80fbb698e6b66e2038a7692c4b78c2ce9
Signed-off-by: Maulik Shah <quic_mkshah@quicinc.com>

drivers/soc/qcom/rpmh-rsc.c

@@ -1218,6 +1218,13 @@ int rpmh_rsc_is_tcs_completed(struct rsc_drv *drv, int ch)
 			sts &= CH1_WAKE_TCS_STATUS;
 
 		retry--;
+		/*
+		 * Wait till all the WAKE votes of the new channel are
+		 * applied during channel switch.
+		 * Maximum delay of 100 usec.
+		 */
+		if (!sts)
+			udelay(10);
 	} while (!sts && retry);
 
 	if (!retry) {