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/arch/arm/mach-imx/cmd_nandbcb.c b/arch/arm/mach-imx/cmd_nandbcb.c
index 0ab1b55..44fc376 100644
--- a/arch/arm/mach-imx/cmd_nandbcb.c
+++ b/arch/arm/mach-imx/cmd_nandbcb.c
@@ -17,6 +17,7 @@
 #include <malloc.h>
 #include <nand.h>
 #include <dm/devres.h>
+#include <linux/bug.h>
 
 #include <asm/io.h>
 #include <jffs2/jffs2.h>