[ALSA] Make CONFIG_SND_CS46XX_NEW_DSP yes as default

Removed from CONFIG_EXPERIMENTAL from CONFIG_SND_CS46XX_NEW_DSP, and
make default to yes.  This option works fine for years.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/Kconfig

@@ -195,8 +195,9 @@ config SND_CS46XX
 	  will be called snd-cs46xx.
 
 config SND_CS46XX_NEW_DSP
-	bool "Cirrus Logic (Sound Fusion) New DSP support (EXPERIMENTAL)"
-	depends on SND_CS46XX && EXPERIMENTAL
+	bool "Cirrus Logic (Sound Fusion) New DSP support"
+	depends on SND_CS46XX
+        default y
 	help
 	  Say Y here to use a new DSP image for SPDIF and dual codecs.