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/rtc/i2c_rtc_emul.c b/drivers/rtc/i2c_rtc_emul.c
index d4b33e5..a010af4 100644
--- a/drivers/rtc/i2c_rtc_emul.c
+++ b/drivers/rtc/i2c_rtc_emul.c
@@ -16,6 +16,7 @@
 #include <common.h>
 #include <dm.h>
 #include <i2c.h>
+#include <log.h>
 #include <os.h>
 #include <rtc.h>
 #include <asm/rtc.h>