fbcon: Fix outdated registered_fb reference in comment

The variable was renamed to fbcon_registered_fb, but this comment was
not updated along with the change. Correct it to avoid confusion.

Signed-off-by: Shixiong Ou <[email protected]>
Fixes: efc3acb ("fbcon: Maintain a private array of fb_info")
[sima: Add Fixes: line.]
Signed-off-by: Simona Vetter <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: Shixiong Ou

drivers/video/fbdev/core/fbcon.c

@@ -953,13 +953,13 @@ static const char *fbcon_startup(void)
 	int rows, cols;
 
 	/*
-	 *  If num_registered_fb is zero, this is a call for the dummy part.
+	 *  If fbcon_num_registered_fb is zero, this is a call for the dummy part.
 	 *  The frame buffer devices weren't initialized yet.
 	 */
 	if (!fbcon_num_registered_fb || info_idx == -1)
 		return display_desc;
 	/*
-	 * Instead of blindly using registered_fb[0], we use info_idx, set by
+	 * Instead of blindly using fbcon_registered_fb[0], we use info_idx, set by
 	 * fbcon_fb_registered();
 	 */
 	info = fbcon_registered_fb[info_idx];