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-fsl-layerscape/immap_lsch2.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
index 862ec2e..c9be076 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
@@ -7,6 +7,9 @@
 #define __ARCH_FSL_LSCH2_IMMAP_H__
 
 #include <fsl_immap.h>
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#endif
 
 #define CONFIG_SYS_IMMR				0x01000000
 #define CONFIG_SYS_DCSRBAR			0x20000000