video: fbcon: Keep atleast one mode in modelist

video: fbcon: Keep atleast one mode in modelist

Framebuffer console init requires atleast one valid
mode to exist for it to succeed.
Virtual terminals relies on the success of fbcon_init
without really checking the return value of this function.

Bug 200036424

Change-Id: Ia34da6ab3814f667a485d23ef88e1a52f8b5519b
Signed-off-by: Pankaj Dabade <pdabade@nvidia.com>
Reviewed-on: http://git-master/r/707309
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>
Reviewed-by: Matthew Pedro <mapedro@nvidia.com>