[PATCH] ppc: fix a bunch of warnings

Building a PowerMac kernel with ARCH=powerpc causes a bunch of warnings,
this fixes some of them

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 751f5dd..9d4e07f 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -17,6 +17,7 @@
 #include <linux/spinlock.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/delay.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
@@ -83,7 +84,7 @@
 		while (width-- > 0)
 			call_rtas_display_status(' ');
 		width = 16;
-		udelay(500000);
+		mdelay(500);
 		pending_newline = 1;
 	} else {
 		if (pending_newline) {