pcsp - Don't build pcspkr when snd-pcsp is enabled

- Update CREDITS with the pc-speaker driver authors.
- Prevent pcspkr from being built together with snd-pcsp.
  Both pcspkr and snd-pcsp use the same platform driver name "pcspkr".
Signed-off-by: NStas Sergeev <stsp@aknet.ru>

CREDITS

@@ -403,6 +403,8 @@ D: Linux CD and Support Giveaway List
 N: Erik Inge Bolsø
 E: knan@mo.himolde.no
 D: Misc kernel hacks
+D: Updated PC speaker driver for 2.3
+S: Norway
 
 N: Andreas E. Bombe
 E: andreas.bombe@munich.netsurf.de
@@ -3116,6 +3118,12 @@ S: Post Office Box 64132
 S: Sunnyvale, California 94088-4132
 S: USA
 
+N: Stas Sergeev
+E: stsp@users.sourceforge.net
+D: PCM PC-Speaker driver
+D: misc fixes
+S: Russia
+
 N: Simon Shapiro
 E: shimon@i-Connect.Net
 W: http://www.-i-Connect.Net/~shimon

drivers/input/misc/Kconfig

@@ -15,6 +15,7 @@ if INPUT_MISC
 config INPUT_PCSPKR
 	tristate "PC Speaker support"
 	depends on ALPHA || X86 || MIPS || PPC_PREP || PPC_CHRP || PPC_PSERIES
+	depends on SND_PCSP=n
 	help
 	  Say Y here if you want the standard PC Speaker to be used for
 	  bells and whistles.