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/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 6ede98c..c119486 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -12,6 +12,7 @@
 #include <linux/device.h>
 #include <linux/kernel.h>
 #endif
+#include <linux/bitops.h>
 #include <linux/mtd/spinand.h>
 
 #define SPINAND_MFR_WINBOND		0xEF