powerpc/44x: Migrate Taishan support to ppc44x_simple

Migrate the AMCC Taishan 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 84e2a70..e0bea83 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -40,6 +40,7 @@
 	bool "Taishan"
 	depends on 44x
 	default n
+	select PPC44x_SIMPLE
 	select 440GX
 	select PCI
 	help