common: Drop linux/bug.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/usb/musb-new/am35x.c b/drivers/usb/musb-new/am35x.c
index 6e5be90..69d6104 100644
--- a/drivers/usb/musb-new/am35x.c
+++ b/drivers/usb/musb-new/am35x.c
@@ -26,6 +26,7 @@
 #else
 #include <common.h>
 #include <asm/omap_musb.h>
+#include <linux/bug.h>
 #include "linux-compat.h"
 #endif