media: dvb-frontends: drx39xyj: replace return with goto for proper unwind

In three places there was a return instead of a goto to the unwind
code.

This fixes three smatch warnings:

drxj.c:9542 ctrl_get_qam_sig_quality() warn: missing unwind goto?
drxj.c:10919 ctrl_set_standard() warn: missing unwind goto?
drxj.c:11466 drxj_open() warn: missing unwind goto?
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/dvb-frontends/drx39xyj/drxj.c

@@ -9539,7 +9539,8 @@ ctrl_get_qam_sig_quality(struct drx_demod_instance *demod)
 		qam_sl_sig_power = DRXJ_QAM_SL_SIG_POWER_QAM256 << 2;
 		break;
 	default:
-		return -EIO;
+		rc = -EIO;
+		goto rw_error;
 	}
 
 	/* ------------------------------ */
@@ -10916,7 +10917,8 @@ ctrl_set_standard(struct drx_demod_instance *demod, enum drx_standard *standard)
 		break;
 	case DRX_STANDARD_AUTO:
 	default:
-		return -EINVAL;
+		rc = -EINVAL;
+		goto rw_error;
 	}
 
 	/*
@@ -11463,7 +11465,8 @@ static int drxj_open(struct drx_demod_instance *demod)
 
 		if (DRX_ISPOWERDOWNMODE(demod->my_common_attr->current_power_mode)) {
 			pr_err("Should powerup before loading the firmware.");
-			return -EINVAL;
+			rc = -EINVAL;
+			goto rw_error;
 		}
 
 		rc = drx_ctrl_u_code(demod, &ucode_info, UCODE_UPLOAD);