sparc: Kill PROM console driver.

Many years ago when this driver was written, it had a use, but these
days it's nothing but trouble and distributions should not enable it
in any situation.

Pretty much every console device a sparc machine could see has a
bonafide real driver, making the PROM console hack unnecessary.

If any new device shows up, we should write a driver instead of
depending upon this crutch to save us.  We've been able to take care
of this even when no chip documentation exists (sunxvr500, sunxvr2500)
so there are no excuses.

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/char/vt.c

@@ -2948,9 +2948,6 @@ int __init vty_init(const struct file_operations *console_fops)
 		panic("Couldn't register console driver\n");
 	kbd_init();
 	console_map_init();
-#ifdef CONFIG_PROM_CONSOLE
-	prom_con_init();
-#endif
 #ifdef CONFIG_MDA_CONSOLE
 	mda_console_init();
 #endif