[PATCH] ppc32: Allow user to individual select CHRP/PMAC/PREP config

Made the CHRP/PMAC/PREP config options selectable by the user.
This allows us to build kernels specifically for one of the
platforms thus reducing code size.
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/ppc/Kconfig

@@ -747,12 +747,13 @@ config CPM2
 	  on it (826x, 827x, 8560).
 
 config PPC_CHRP
+	bool "  Common Hardware Reference Platform (CHRP) based machines"
 	bool
 	depends on PPC_MULTIPLATFORM
 	default y
 
 config PPC_PMAC
-	bool
+	bool "  Apple PowerMac based machines"
 	depends on PPC_MULTIPLATFORM
 	default y
 
@@ -762,6 +763,7 @@ config PPC_PMAC64
 	default y
 
 config PPC_PREP
+	bool "  PowerPC Reference Platform (PREP) based machines"
 	bool
 	depends on PPC_MULTIPLATFORM
 	default y