mmc: core: Cleanup mmc_sd_num_wr_blocks() function

Use mmc_app_cmd() to avoid open-coding in mmc_sd_num_wr_blocks().
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
Link: https://lore.kernel.org/r/20230811101404.4463-1-victorshihgli@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/block.c

@@ -918,17 +918,9 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
 
 	struct scatterlist sg;
 
-	cmd.opcode = MMC_APP_CMD;
-	cmd.arg = card->rca << 16;
-	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
-
-	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	err = mmc_app_cmd(card->host, card);
 	if (err)
 		return err;
-	if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
-		return -EIO;
-
-	memset(&cmd, 0, sizeof(struct mmc_command));
 
 	cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
 	cmd.arg = 0;