platform/mellanox: mlxreg-lc: Make error handling flow consistent

Use 'goto' statement in error flow of mlxreg_lc_event_handler() at all
places for consistency.

This follow-up patch implementing comments from
https://www.spinics.net/lists/platform-driver-x86/msg34587.html

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20220904141113.49048-1-vadimp@nvidia.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/mellanox/mlxreg-lc.c

@@ -564,10 +564,8 @@ static int mlxreg_lc_event_handler(void *handle, enum mlxreg_hotplug_kind kind,
 		 mlxreg_lc->data->slot, mlxreg_lc->state, kind, action);
 
 	mutex_lock(&mlxreg_lc->lock);
-	if (!(mlxreg_lc->state & MLXREG_LC_INITIALIZED)) {
-		mutex_unlock(&mlxreg_lc->lock);
-		return 0;
-	}
+	if (!(mlxreg_lc->state & MLXREG_LC_INITIALIZED))
+		goto mlxreg_lc_non_initialzed_exit;
 
 	switch (kind) {
 	case MLXREG_HOTPLUG_LC_SYNCED:
@@ -594,8 +592,8 @@ static int mlxreg_lc_event_handler(void *handle, enum mlxreg_hotplug_kind kind,
 				/* In case line card is configured - enable it. */
 				if (mlxreg_lc->state & MLXREG_LC_CONFIGURED)
 					err = mlxreg_lc_enable_disable(mlxreg_lc, 1);
-				mutex_unlock(&mlxreg_lc->lock);
-				return err;
+
+				goto mlxreg_lc_enable_disable_exit;
 			}
 			err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->main_devs,
 							      mlxreg_lc->main_devs_num);
@@ -627,8 +625,10 @@ static int mlxreg_lc_event_handler(void *handle, enum mlxreg_hotplug_kind kind,
 		break;
 	}
 
+mlxreg_lc_enable_disable_exit:
 mlxreg_lc_power_on_off_fail:
 mlxreg_lc_create_static_devices_fail:
+mlxreg_lc_non_initialzed_exit:
 	mutex_unlock(&mlxreg_lc->lock);
 
 	return err;