sandbox: exynos: Move CONFIG_SOUND_MAX98095 to Kconfig

Move this over to Kconfig and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/arndale_defconfig b/configs/arndale_defconfig
index 3d5c870..f77209a 100644
--- a/configs/arndale_defconfig
+++ b/configs/arndale_defconfig
@@ -7,3 +7,4 @@
 CONFIG_CMD_SOUND=y
 CONFIG_I2S=y
 CONFIG_I2S_SAMSUNG=y
+CONFIG_SOUND_MAX98095=y
diff --git a/configs/smdk5250_defconfig b/configs/smdk5250_defconfig
index 1234619..8dd6b95 100644
--- a/configs/smdk5250_defconfig
+++ b/configs/smdk5250_defconfig
@@ -7,3 +7,4 @@
 CONFIG_CMD_SOUND=y
 CONFIG_I2S=y
 CONFIG_I2S_SAMSUNG=y
+CONFIG_SOUND_MAX98095=y
diff --git a/configs/snow_defconfig b/configs/snow_defconfig
index d8c01e6..0fd084b 100644
--- a/configs/snow_defconfig
+++ b/configs/snow_defconfig
@@ -11,3 +11,4 @@
 CONFIG_CMD_SOUND=y
 CONFIG_I2S=y
 CONFIG_I2S_SAMSUNG=y
+CONFIG_SOUND_MAX98095=y
diff --git a/drivers/sound/Kconfig b/drivers/sound/Kconfig
index 1b97af0..cfc75cb 100644
--- a/drivers/sound/Kconfig
+++ b/drivers/sound/Kconfig
@@ -28,3 +28,11 @@
 	  using one of the available audio codec drivers. Enabling this
 	  option provides an implementation for sound_init() and
 	  sound_play().
+
+config SOUND_MAX98095
+	bool "Support Maxim max98095 audio codec"
+	depends on I2S_SAMSUNG
+	help
+	  Enable the max98095 audio codec. This is connected via I2S for
+	  audio data and I2C for codec control. At present it only works
+	  with the Samsung I2S driver.
diff --git a/include/configs/exynos5250-common.h b/include/configs/exynos5250-common.h
index 895d6e1..79a7adf 100644
--- a/include/configs/exynos5250-common.h
+++ b/include/configs/exynos5250-common.h
@@ -30,7 +30,6 @@
 
 /* Sound */
 #ifdef CONFIG_CMD_SOUND
-#define CONFIG_SOUND_MAX98095
 #define CONFIG_SOUND_WM8994
 #endif