ASoC: codecs: use function if config is enabled

Use "wcd_mbhc_usbc_ana_event_handler" function only when
CONFIG_QCOM_FSA4480_I2C is enabled.

Change-Id: I5211a8ce09fb06021310e528b5815fdbcd3f2dab
Signed-off-by: Vignesh Kulothungan <[email protected]>

asoc/codecs/wcd-mbhc-v2.c

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015-2020, The Linux Foundation. All rights reserved.
  */
 #include <linux/module.h>
 #include <linux/init.h>
@@ -1579,6 +1579,7 @@ static int wcd_mbhc_set_keycode(struct wcd_mbhc *mbhc)
 	return result;
 }
 
+#if IS_ENABLED(CONFIG_QCOM_FSA4480_I2C)
 static int wcd_mbhc_usbc_ana_event_handler(struct notifier_block *nb,
 					   unsigned long mode, void *ptr)
 {
@@ -1597,6 +1598,13 @@ static int wcd_mbhc_usbc_ana_event_handler(struct notifier_block *nb,
 	}
 	return 0;
 }
+#else
+static int wcd_mbhc_usbc_ana_event_handler(struct notifier_block *nb,
+					   unsigned long mode, void *ptr)
+{
+	return 0;
+}
+#endif
 
 int wcd_mbhc_start(struct wcd_mbhc *mbhc, struct wcd_mbhc_config *mbhc_cfg)
 {