[PATCH] powerpc: move mmio_nvram.c over to arch/powerpc

The nvram code formally known as bpa_nvram.c is rather
generic really, so it is quite likely to be useful to
future boards not based on cell.

This patch puts it into arch/powerpc/sysdev.

Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index aa13a9d..1c44a1d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -325,6 +325,7 @@
 	depends on PPC_MULTIPLATFORM && PPC64
 	select PPC_RTAS
 	select RTAS_FW
+	select MMIO_NVRAM
 
 config PPC_OF
 	bool
@@ -360,6 +361,10 @@
 	depends on PPC_RTAS
 	default n
 
+config MMIO_NVRAM
+	bool
+	default n
+
 config MPIC_BROKEN_U3
 	bool
 	depends on PPC_MAPLE