ARM: shmobile: kzm9g: enable DMAEngine on FSI

It is possible to reduce CPU load if FSI playback used DMAEngine.
This patch enabled it.
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

arch/arm/mach-shmobile/board-kzm9g.c

@@ -470,6 +470,7 @@ static struct platform_device gpio_keys_device = {
 /* FSI-AK4648 */
 static struct sh_fsi_platform_info fsi_info = {
 	.port_a = {
+		.tx_id = SHDMA_SLAVE_FSI2A_TX,
 	},
 };