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/ram/stm32mp1/stm32mp1_ddr.c b/drivers/ram/stm32mp1/stm32mp1_ddr.c
index 11b14ae..f10ecdd 100644
--- a/drivers/ram/stm32mp1/stm32mp1_ddr.c
+++ b/drivers/ram/stm32mp1/stm32mp1_ddr.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <clk.h>
+#include <log.h>
 #include <ram.h>
 #include <reset.h>
 #include <timer.h>