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-tegra/dc.h b/arch/arm/include/asm/arch-tegra/dc.h
index 59347dd..6444af2 100644
--- a/arch/arm/include/asm/arch-tegra/dc.h
+++ b/arch/arm/include/asm/arch-tegra/dc.h
@@ -7,6 +7,10 @@
 #ifndef __ASM_ARCH_TEGRA_DC_H
 #define __ASM_ARCH_TEGRA_DC_H
 
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#endif
+
 /* Register definitions for the Tegra display controller */
 
 /* CMD register 0x000 ~ 0x43 */