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/clk/clk-hsdk-cgu.c b/drivers/clk/clk-hsdk-cgu.c
index b740720..da50a79 100644
--- a/drivers/clk/clk-hsdk-cgu.c
+++ b/drivers/clk/clk-hsdk-cgu.c
@@ -14,6 +14,7 @@
 #include <div64.h>
 #include <dm.h>
 #include <log.h>
+#include <linux/bug.h>
 #include <linux/io.h>
 #include <asm/arcregs.h>