mmc: core: Convert sprintf/snprintf to sysfs_emit

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

sprintf() will be converted as weel if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Link: https://lore.kernel.org/r/20240314091512.1323650-1-lizhijian@fujitsu.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/block.c

@@ -234,7 +234,7 @@ static ssize_t power_ro_lock_show(struct device *dev,
 	else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
 		locked = 1;
 
-	ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
+	ret = sysfs_emit(buf, "%d\n", locked);
 
 	mmc_blk_put(md);
 
@@ -296,9 +296,9 @@ static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
 	int ret;
 	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
 
-	ret = snprintf(buf, PAGE_SIZE, "%d\n",
-		       get_disk_ro(dev_to_disk(dev)) ^
-		       md->read_only);
+	ret = sysfs_emit(buf, "%d\n",
+			 get_disk_ro(dev_to_disk(dev)) ^
+			 md->read_only);
 	mmc_blk_put(md);
 	return ret;
 }