mmc: rtsx_pci: Enable MMC_CAP_ERASE to allow erase/discard/trim requests

Cc: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Mauro Santos <registo.mailling@gmail.com>

drivers/mmc/host/rtsx_pci_sdmmc.c

@@ -1360,7 +1360,7 @@ static void realtek_init_host(struct realtek_pci_sdmmc *host)
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
 		MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
-		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
+		MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 | MMC_CAP_ERASE;
 	mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE;
 	mmc->max_current_330 = 400;
 	mmc->max_current_180 = 800;