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/board/sbc8349/sbc8349.c b/board/sbc8349/sbc8349.c
index c84146a..1e3529f 100644
--- a/board/sbc8349/sbc8349.c
+++ b/board/sbc8349/sbc8349.c
@@ -12,6 +12,7 @@
 #include <init.h>
 #include <ioports.h>
 #include <mpc83xx.h>
+#include <asm/bitops.h>
 #include <asm/mpc8349_pci.h>
 #include <i2c.h>
 #include <spd_sdram.h>