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/include/mmc.h b/include/mmc.h
index 6a2e973..8256219 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -9,6 +9,7 @@
 #ifndef _MMC_H_
 #define _MMC_H_
 
+#include <linux/bitops.h>
 #include <linux/list.h>
 #include <linux/sizes.h>
 #include <linux/compiler.h>