ASoC: cs42l56: Use IS_ENABLED() instead of checking for built-in or module

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs42l56.c

@@ -56,7 +56,7 @@ struct  cs42l56_private {
 	u8 iface;
 	u8 iface_fmt;
 	u8 iface_inv;
-#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
+#if IS_ENABLED(CONFIG_INPUT)
 	struct input_dev *beep;
 	struct work_struct beep_work;
 	int beep_rate;