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-rockchip/cru_rk3128.h b/arch/arm/include/asm/arch-rockchip/cru_rk3128.h
index 40a5ca7..cca812d 100644
--- a/arch/arm/include/asm/arch-rockchip/cru_rk3128.h
+++ b/arch/arm/include/asm/arch-rockchip/cru_rk3128.h
@@ -6,6 +6,10 @@
 #ifndef _ASM_ARCH_CRU_RK3128_H
 #define _ASM_ARCH_CRU_RK3128_H
 
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#endif
+
 #define MHz		1000000
 #define OSC_HZ		(24 * MHz)