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/net/pic32_eth.h b/drivers/net/pic32_eth.h
index 823c565..7b873bc 100644
--- a/drivers/net/pic32_eth.h
+++ b/drivers/net/pic32_eth.h
@@ -7,6 +7,7 @@
 #ifndef __MICROCHIP_PIC32_ETH_H_
 #define __MICROCHIP_PIC32_ETH_H_
 
+#include <linux/bitops.h>
 #include <mach/pic32.h>
 
 /* Ethernet */