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-socfpga/include/mach/firewall.h b/arch/arm/mach-socfpga/include/mach/firewall.h
index 430341b..adab65b 100644
--- a/arch/arm/mach-socfpga/include/mach/firewall.h
+++ b/arch/arm/mach-socfpga/include/mach/firewall.h
@@ -7,6 +7,8 @@
 #ifndef	_FIREWALL_H_
 #define	_FIREWALL_H_
 
+#include <linux/bitops.h>
+
 struct socfpga_firwall_l4_per {
 	u32	nand;		/* 0x00 */
 	u32	nand_data;