ARM: rmobile: salvator-x: Enable SCIF2 clock

There are two UARTs on the board, so enable the clock for the
second one as well.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

include/configs/salvator-x.h

@@ -81,6 +81,8 @@
 /* Module stop status bits */
 /* MFIS, SCIF1 */
 #define CONFIG_SMSTP2_ENA	0x00002040
+/* SCIF2 */
+#define CONFIG_SMSTP3_ENA	0x00000400
 /* INTC-AP, IRQC */
 #define CONFIG_SMSTP4_ENA	0x00000180