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/stm32_sdram.c b/drivers/ram/stm32_sdram.c
index 2e06b52..d9b1b24 100644
--- a/drivers/ram/stm32_sdram.c
+++ b/drivers/ram/stm32_sdram.c
@@ -8,6 +8,7 @@
 #include <clk.h>
 #include <dm.h>
 #include <init.h>
+#include <log.h>
 #include <ram.h>
 #include <asm/io.h>
 #include <dm/device_compat.h>