[PATCH] fbcon: Fix setup boot options of fbcon

This patch fixes the 'fbcon=map:<option>" of fbcon.  (This option has been
present since 2.4, but got broken in 2.6). This particular option tells
fbcon what framebuffer device gets mapped to what console. Syntax is:

	fbcon=map:abcd...

	where a, b, c, d,... are framebuffer numbers as it would
	appear in /proc/fb.

Given only 2 valid fbdevs, 0 and 1, if fbcon=map:0110, then:

tty1 = fb0
tty2 = fb1
tty3 = fb1
tty4 = fb0
(sequence repeats for the rest of the consoles)

If an invalid framebuffer is used, then the console will be mapped to the
first user-chosen framebuffer.  Ie: fbcon=map:102

tty1 = fb1
tty2 = fb0
tty3 = fb1 <

drivers/video/fbmem.c

@@ -948,14 +948,11 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 #endif /* CONFIG_KMOD */
 		if (!registered_fb[con2fb.framebuffer])
 		    return -EINVAL;
-		if (con2fb.console > 0 && con2fb.console < MAX_NR_CONSOLES) {
-			event.info = info;
-			event.data = &con2fb;
-			return notifier_call_chain(&fb_notifier_list,
-						   FB_EVENT_SET_CONSOLE_MAP,
-						   &event);
-		}
-		return -EINVAL;
+		event.info = info;
+		event.data = &con2fb;
+		return notifier_call_chain(&fb_notifier_list,
+					   FB_EVENT_SET_CONSOLE_MAP,
+					   &event);
 	case FBIOBLANK:
 		acquire_console_sem();
 		i = fb_blank(info, arg);