x86: Enable time command for coreboot

This command is useful for measuring SPI flash load times and the like.
Enable gettime as well to obtain absolute time tick values.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/configs/coreboot.h

@@ -179,6 +179,8 @@
 #define CONFIG_CMD_SAVEENV
 #define CONFIG_CMD_SETGETDCR
 #define CONFIG_CMD_SOURCE
+#define CONFIG_CMD_TIME
+#define CONFIG_CMD_GETTIME
 #define CONFIG_CMD_XIMG
 #define CONFIG_CMD_SCSI