powerpc/44x: Migrate Katmai support to ppc44x_simple

Migrate the AMCC Katmai board to use the ppc44x_simple platform file.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 92ba2d8..66d4499 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -49,6 +49,7 @@
 	bool "Katmai"
 	depends on 44x
 	default n
+	select PPC44x_SIMPLE
 	select 440SPe
 	select PCI
 	select PPC4xx_PCI_EXPRESS