[ALSA] pcsp - Fix more dependency

Added the missing dependency and select for snd-pcsp driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig
index fe85af1..a78a8d0 100644
--- a/sound/drivers/Kconfig
+++ b/sound/drivers/Kconfig
@@ -8,6 +8,8 @@
 	tristate "Internal PC speaker support"
 	depends on X86_PC && HIGH_RES_TIMERS
 	depends on INPUT
+	depends on SND
+	select SND_PCM
 	help
 	  If you don't have a sound card in your computer, you can include a
 	  driver for the PC speaker which allows it to act like a primitive