[POWERPC] 4xx: Fix Walnut build

The addition of of_rtc for the Walnut board was only half complete.  Select
OF_RTC in the Kconfig and include the appropriate header to make it compile.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/40x/Kconfig b/arch/powerpc/platforms/40x/Kconfig
index 74f31177e47a..a9260e21451e 100644
--- a/arch/powerpc/platforms/40x/Kconfig
+++ b/arch/powerpc/platforms/40x/Kconfig
@@ -72,6 +72,7 @@ config WALNUT
         default y
         select 405GP
         select PCI
+        select OF_RTC
         help
           This option enables support for the IBM PPC405GP evaluation board.
 
diff --git a/arch/powerpc/platforms/40x/walnut.c b/arch/powerpc/platforms/40x/walnut.c
index 5d9edd917f92..b8b257efeb77 100644
--- a/arch/powerpc/platforms/40x/walnut.c
+++ b/arch/powerpc/platforms/40x/walnut.c
@@ -18,6 +18,7 @@
 
 #include <linux/init.h>
 #include <linux/of_platform.h>
+#include <linux/rtc.h>
 
 #include <asm/machdep.h>
 #include <asm/prom.h>