sparc64: Fix initrd regression.

We die because we forget to convert initrd_start and
initrd_end to virtual addresses.

Reported by Mikael Pettersson

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index db8e7fb..ec3e2c7 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -771,6 +771,9 @@
 		initrd_end = ramdisk_image + sparc_ramdisk_size;
 
 		lmb_reserve(initrd_start, initrd_end);
+
+		initrd_start += PAGE_OFFSET;
+		initrd_end += PAGE_OFFSET;
 	}
 #endif
 }