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/ata/ahci.c b/drivers/ata/ahci.c
index dda3586..47cdea1 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -12,6 +12,7 @@
 #include <blk.h>
 #include <cpu_func.h>
 #include <log.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 
 #include <command.h>