coresight: tmc-etr: Assign boolean values to a bool variable

Fix the following coccinelle warnings:

./drivers/hwtracing/coresight/coresight-tmc-etr.c:957:2-15: WARNING: Assignment of 0/1 to bool variable

Fix them by assigning boolean values.
Reported-by: Tosk Robot <tencent_os_robot@tencent.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20201127175256.1092685-12-mathieu.poirier@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hwtracing/coresight/coresight-tmc-etr.c

@@ -954,11 +954,11 @@ static void tmc_sync_etr_buf(struct tmc_drvdata *drvdata)
 		dev_dbg(&drvdata->csdev->dev,
 			"tmc memory error detected, truncating buffer\n");
 		etr_buf->len = 0;
-		etr_buf->full = 0;
+		etr_buf->full = false;
 		return;
 	}
 
-	etr_buf->full = status & TMC_STS_FULL;
+	etr_buf->full = !!(status & TMC_STS_FULL);
 
 	WARN_ON(!etr_buf->ops || !etr_buf->ops->sync);