common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/hwconfig.c b/common/hwconfig.c
index 72f3c4e..daf3eea 100644
--- a/common/hwconfig.c
+++ b/common/hwconfig.c
@@ -14,6 +14,7 @@
 #include <env.h>
 #include <exports.h>
 #include <hwconfig.h>
+#include <log.h>
 #include <linux/types.h>
 #include <linux/string.h>
 #else