media: imon: 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 <[e-mail]>
Signed-off-by: Sean Young <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/rc/imon.c

···
 	mutex_lock(&ictx->lock);
 
 	if (!ictx->display_supported) {
-		len = snprintf(buf, PAGE_SIZE, "Not supported.");
+		len = sysfs_emit(buf, "Not supported.");
 	} else {
-		len = snprintf(buf, PAGE_SIZE,
-			"To set the clock on your iMON display:\n"
-			"# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
-			"%s", ictx->display_isopen ?
-			"\nNOTE: imon device must be closed\n" : "");
+		len = sysfs_emit(buf,
+				 "To set the clock on your iMON display:\n"
+				 "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
+				 "%s", ictx->display_isopen ?
+				 "\nNOTE: imon device must be closed\n" : "");
 	}
 
 	mutex_unlock(&ictx->lock);