fbdev: Remove trailing whitespaces

Fix coding style.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Link: https://lore.kernel.org/r/20250612081738.197826-2-tzimmermann@suse.de

drivers/video/fbdev/macmodes.c

@@ -236,7 +236,7 @@ int mac_vmode_to_var(int vmode, int cmode, struct fb_var_screeninfo *var)
 	case CMODE_8:
 	    var->bits_per_pixel = 8;
 	    var->red.offset = 0;
-	    var->red.length = 8;   
+	    var->red.length = 8;
 	    var->green.offset = 0;
 	    var->green.length = 8;
 	    var->blue.offset = 0;