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/spi/zynq_qspi.c b/drivers/spi/zynq_qspi.c
index 8451f83..db473da 100644
--- a/drivers/spi/zynq_qspi.c
+++ b/drivers/spi/zynq_qspi.c
@@ -12,6 +12,7 @@
 #include <malloc.h>
 #include <spi.h>
 #include <asm/io.h>
+#include <linux/bitops.h>
 
 DECLARE_GLOBAL_DATA_PTR;