asoc: wcd937x: Fix compile error in wcd937x codec driver

Update function return value to avoid compile error

Change-Id: Ia463ea8bb3c87ac6fb9f5959be0f5a6fa461667d
Signed-off-by: Kunlei Zhang <[email protected]>

asoc/codecs/wcd937x/wcd937x-mbhc.h

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
  */
 #ifndef __WCD937X_MBHC_H__
 #define __WCD937X_MBHC_H__
@@ -52,7 +52,6 @@ static inline int wcd937x_mbhc_post_ssr_init(struct wcd937x_mbhc *mbhc,
 static inline void wcd937x_mbhc_ssr_down(struct wcd937x_mbhc *mbhc,
 					   struct snd_soc_component *component)
 {
-	return 0;
 }
 static inline int wcd937x_mbhc_get_impedance(struct wcd937x_mbhc *wcd937x_mbhc,
 					   uint32_t *zl, uint32_t *zr)