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/ddr/fsl/ddr4_dimm_params.c b/drivers/ddr/fsl/ddr4_dimm_params.c
index 3d5f27e..e2bdc12 100644
--- a/drivers/ddr/fsl/ddr4_dimm_params.c
+++ b/drivers/ddr/fsl/ddr4_dimm_params.c
@@ -13,6 +13,7 @@
 #include <common.h>
 #include <fsl_ddr_sdram.h>
 #include <log.h>
+#include <linux/bug.h>
 
 #include <fsl_ddr.h>