ALSA: hda - Simplify CONFIG_SND_HDA_I915 condition

CONFIG_SND_HDA_I915 doesn't have to be user-selectable as this is almost
mandatory when i915 driver is available.  Let's enable it always when
CONFIG_DRM_I915 is set, so that user won't be bothered by useless
questions.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/Kconfig

@@ -152,14 +152,9 @@ config SND_HDA_CODEC_HDMI
 	  This module is automatically loaded at probing.
 
 config SND_HDA_I915
-	bool "Build Display HD-audio controller/codec power well support for i915 cards"
+	bool
+	default y
 	depends on DRM_I915
-	help
-	  Say Y here to include full HDMI and DisplayPort HD-audio controller/codec
-	  power-well support for Intel Haswell graphics cards based on the i915 driver.
-
-	  Note that this option must be enabled for Intel Haswell C+ stepping machines, otherwise
-	  the GPU audio controller/codecs will not be initialized or damaged when exit from S3 mode.
 
 config SND_HDA_CODEC_CIRRUS
 	bool "Build Cirrus Logic codec support"