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/spi.h b/include/spi.h
index 2b4929f..5cc6d6e 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -10,6 +10,7 @@
 #define _SPI_H_
 
 #include <common.h>
+#include <linux/bitops.h>
 
 /* SPI mode flags */
 #define SPI_CPHA	BIT(0)			/* clock phase */