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/mach-uniphier/dram/ddrphy-regs.h b/arch/arm/mach-uniphier/dram/ddrphy-regs.h
index 6a041c5..8b34292 100644
--- a/arch/arm/mach-uniphier/dram/ddrphy-regs.h
+++ b/arch/arm/mach-uniphier/dram/ddrphy-regs.h
@@ -9,6 +9,7 @@
 #ifndef ARCH_DDRPHY_REGS_H
 #define ARCH_DDRPHY_REGS_H
 
+#include <linux/bitops.h>
 #define PHY_REG_SHIFT		2
 
 #define PHY_RIDR		(0x000 << PHY_REG_SHIFT)