mmc: mmc_spi: generate R1 response for different mmc SPI commands

R1 response is 1 byte long for mmc SPI commands as per the updated
physical layer specification version 7.10.

So correct the resp and resp_size for existing commands

Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Tested-by: Bin Meng <bin.meng@windriver.com>

drivers/mmc/mmc_spi.c

@@ -305,6 +305,8 @@ static int dm_mmc_spi_request(struct udevice *dev, struct mmc_cmd *cmd,
 	case MMC_CMD_READ_MULTIPLE_BLOCK:
 	case MMC_CMD_WRITE_SINGLE_BLOCK:
 	case MMC_CMD_WRITE_MULTIPLE_BLOCK:
+		resp = &resp8;
+		resp_size = sizeof(resp8);
 		break;
 	default:
 		resp = &resp8;