auxdisplay: img-ascii-lcd: Convert device attribute to sysfs_emit()

Convert the "message" device attribute from sprintf() to sysfs_emit(),
as the latter is aware of the PAGE_SIZE buffer.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

drivers/auxdisplay/img-ascii-lcd.c

@@ -326,7 +326,7 @@ static ssize_t message_show(struct device *dev, struct device_attribute *attr,
 {
 	struct img_ascii_lcd_ctx *ctx = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%s\n", ctx->message);
+	return sysfs_emit(buf, "%s\n", ctx->message);
 }
 
 /**