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/imx/imx8m/ddrphy_utils.c b/drivers/ddr/imx/imx8m/ddrphy_utils.c
index 9ac7ca9..d5eef53 100644
--- a/drivers/ddr/imx/imx8m/ddrphy_utils.c
+++ b/drivers/ddr/imx/imx8m/ddrphy_utils.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <errno.h>
+#include <log.h>
 #include <asm/io.h>
 #include <asm/arch/ddr.h>
 #include <asm/arch/clock.h>