fix missing udelay include in mb862xx-i2c

[Dave Jones]

drivers/video/mb862xx/mb862xx-i2c.c: In function âmb862xx_i2c_wait_eventâ:
drivers/video/mb862xx/mb862xx-i2c.c:25:3: error: implicit declaration of function âudelayâ [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

Signed-off-by: Dave Jones <davej@xxxxxxxxxx>

diff --git a/drivers/video/mb862xx/mb862xx-i2c.c b/drivers/video/mb862xx/mb862xx-i2c.c
index cb77d3b..87c79ee 100644
--- a/drivers/video/mb862xx/mb862xx-i2c.c
+++ b/drivers/video/mb862xx/mb862xx-i2c.c
@@ -12,6 +12,7 @@
 #include <linux/fb.h>
 #include <linux/i2c.h>
 #include <linux/io.h>
+#include <asm/delay.h>
 
 #include "mb862xxfb.h"
 #include "mb862xx_reg.h"
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