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/drivers/ddr/altera/sdram_gen5.c b/drivers/ddr/altera/sdram_gen5.c
index 314c7ae..ba588e9 100644
--- a/drivers/ddr/altera/sdram_gen5.c
+++ b/drivers/ddr/altera/sdram_gen5.c
@@ -7,6 +7,7 @@
 #include <errno.h>
 #include <div64.h>
 #include <init.h>
+#include <log.h>
 #include <ram.h>
 #include <reset.h>
 #include <watchdog.h>