common: Drop linux/bitops.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-sunxi/dram_sun6i.h b/arch/arm/include/asm/arch-sunxi/dram_sun6i.h
index 929450f..b66d58c 100644
--- a/arch/arm/include/asm/arch-sunxi/dram_sun6i.h
+++ b/arch/arm/include/asm/arch-sunxi/dram_sun6i.h
@@ -13,6 +13,10 @@
 #ifndef _SUNXI_DRAM_SUN6I_H
 #define _SUNXI_DRAM_SUN6I_H
 
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#endif
+
 struct sunxi_mctl_com_reg {
 	u32 cr;			/* 0x00 */
 	u32 ccr;		/* 0x04 controller configuration register */