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/spl/spl_ram.c b/common/spl/spl_ram.c
index 80572ce..df1d5b4 100644
--- a/common/spl/spl_ram.c
+++ b/common/spl/spl_ram.c
@@ -12,6 +12,7 @@
 #include <common.h>
 #include <binman_sym.h>
 #include <image.h>
+#include <log.h>
 #include <mapmem.h>
 #include <spl.h>
 #include <linux/libfdt.h>