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-mvebu/mbus.c b/arch/arm/mach-mvebu/mbus.c
index 39bd200..f29abe5 100644
--- a/arch/arm/mach-mvebu/mbus.c
+++ b/arch/arm/mach-mvebu/mbus.c
@@ -48,6 +48,7 @@
 
 #include <common.h>
 #include <malloc.h>
+#include <linux/bitops.h>
 #include <linux/errno.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>