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/smem/msm_smem.c b/drivers/smem/msm_smem.c
index 5557fd2..2557269 100644
--- a/drivers/smem/msm_smem.c
+++ b/drivers/smem/msm_smem.c
@@ -13,6 +13,7 @@
 #include <dm/of_access.h>
 #include <dm/of_addr.h>
 #include <asm/io.h>
+#include <linux/bug.h>
 #include <linux/err.h>
 #include <linux/ioport.h>
 #include <linux/io.h>