Revert "firmware/sysfb: Clear screen_info state after consuming it"

This reverts commit df67699c.

Jens Axboe reported a regression that his machine is failing to show a
console, or in fact anything, on current -git. There's no output and no
console after:

Loading Linux 6.7.0+ ...
Loading initial ramdisk ...
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>

drivers/firmware/sysfb.c

@@ -71,7 +71,7 @@ EXPORT_SYMBOL_GPL(sysfb_disable);
 
 static __init int sysfb_init(void)
 {
-	const struct screen_info *si = &screen_info;
+	struct screen_info *si = &screen_info;
 	struct simplefb_platform_data mode;
 	const char *name;
 	bool compatible;
@@ -119,18 +119,6 @@ static __init int sysfb_init(void)
 	if (ret)
 		goto err;
 
-	/*
-	 * The firmware framebuffer is now maintained by the created
-	 * device. Disable screen_info after we've consumed it. Prevents
-	 * invalid access during kexec reboots.
-	 *
-	 * TODO: Vgacon still relies on the global screen_info. Make
-	 *       vgacon work with the platform device, so we can clear
-	 *       the screen_info unconditionally.
-	 */
-	if (strcmp(name, "platform-framebuffer"))
-		screen_info.orig_video_isVGA = 0;
-
 	goto unlock_mutex;
 err:
 	platform_device_put(pd);