coresight-tpdm: Remove the unnecessary lock

Remove the unnecessary lock "CS_{UN,}LOCK" in TPDM driver. This
lock is only needed while writing the data to Coresight registers.
Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/1695882586-10306-2-git-send-email-quic_taozha@quicinc.com

drivers/hwtracing/coresight/coresight-tpdm.c

@@ -114,11 +114,9 @@ static void tpdm_init_default_data(struct tpdm_drvdata *drvdata)
 {
 	u32 pidr;
 
-	CS_UNLOCK(drvdata->base);
 	/*  Get the datasets present on the TPDM. */
 	pidr = readl_relaxed(drvdata->base + CORESIGHT_PERIPHIDR0);
 	drvdata->datasets |= pidr & GENMASK(TPDM_DATASETS - 1, 0);
-	CS_LOCK(drvdata->base);
 }
 
 /*