[MIPS] IP22: Use common SGI button driver

Use the Indy/O2 button driver.

Signed-off-by: Thomas Bogendoerfer <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/sgi-ip22/ip22-platform.c

···
 	if (ip22_is_fullhouse())
 		return 0; /* full house has no volume buttons */
 
-	return IS_ERR(platform_device_register_simple("sgiindybtns",
-						      -1, NULL, 0));
+	return IS_ERR(platform_device_register_simple("sgibtns", -1, NULL, 0));
 }
 
 device_initcall(sgi_button_devinit);