[SPARC]: introduce a SPARC Kconfig symbol

Introduce a Kconfig symbol SPARC that is defined on both the sparc and
sparc64 architectures.

This symbol makes some dependencies more readable.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 07813fc..e08dbe0 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -26,7 +26,7 @@
 
 config INPUT_SPARCSPKR
 	tristate "SPARC Speaker support"
-	depends on PCI && (SPARC32 || SPARC64)
+	depends on PCI && SPARC
 	help
 	  Say Y here if you want the standard Speaker on Sparc PCI systems
 	  to be used for bells and whistles.