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/pci/pci_mpc85xx.c b/drivers/pci/pci_mpc85xx.c
index 8dff68d..6576f53 100644
--- a/drivers/pci/pci_mpc85xx.c
+++ b/drivers/pci/pci_mpc85xx.c
@@ -5,6 +5,7 @@
  *
  */
 #include <common.h>
+#include <asm/bitops.h>
 #include <asm/cpm_85xx.h>
 #include <pci.h>
 #include <dm.h>