sh: Include <linux/io.h> in dac.h

Include <linux/io.h> to avoid depending on <linux/backlight.h>
for including it. Declares __raw_readb() and __raw_writeb().

Signed-off-by: Thomas Zimmermann <[email protected]>
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Fixes: 243ce64 ("backlight: Do not include <linux/fb.h> in header file")
Cc: Thomas Zimmermann <[email protected]>
Cc: Daniel Thompson (RISCstar) <[email protected]>
Cc: Simona Vetter <[email protected]>
Cc: Lee Jones <[email protected]>
Cc: Daniel Thompson <[email protected]>
Cc: Jingoo Han <[email protected]>
Cc: [email protected]
Reviewed-by: John Paul Adrian Glaubitz <[email protected]>
Reviewed-by: Daniel Thompson (RISCstar) <[email protected]>
Signed-off-by: John Paul Adrian Glaubitz <[email protected]>

Author: tdz

arch/sh/include/cpu-sh3/cpu/dac.h

@@ -2,6 +2,8 @@
 #ifndef __ASM_CPU_SH3_DAC_H
 #define __ASM_CPU_SH3_DAC_H
 
+#include <linux/io.h>
+
 /*
  * Copyright (C) 2003  Andriy Skulysh
  */