mmc: sh_mobile_sdhi: enable SDIO IRQs for RCar Gen3

Tested on a Salvator-X board with a Spectec SDW-823 WLAN card.
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sh_mobile_sdhi.c

@@ -71,7 +71,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
 			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 	.bus_shift	= 2,
 };