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/led/led_bcm6858.c b/drivers/led/led_bcm6858.c
index 2be4279..b415d8b 100644
--- a/drivers/led/led_bcm6858.c
+++ b/drivers/led/led_bcm6858.c
@@ -14,6 +14,7 @@
 #include <log.h>
 #include <asm/io.h>
 #include <dm/lists.h>
+#include <linux/bitops.h>
 
 #define LEDS_MAX		32
 #define LEDS_WAIT		100