Revert "vt: fix background color on line feed"

Revert "vt: fix background color on line feed"

This reverts commit e11549460c9d495c777ec6063abcf5667957a4d3, and the
subsequent commits that fixed it up:

 - 83a6c37a "fbcon: prevent cursor disappearance after switching to 512
   character font"

 - 0a657d55 "vt/fbcon: fix background color on line feed"

 - 260134db "vt/fbcon: update scrl_erase_char after 256/512-glyph font
   switch"

by request of Alan Cox. Quoth Alan:
  "Unfortunately it's wrong and its been causing breakages because
   various apps like ncurses expect our previous (and correct)
   behaviour."

Alexander sent out a similar patch.

Requested-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Tested-by: Jan Engelhardt <jengelh@medozas.de>
Cc: Alexander V. Lukyanov <lav@netis.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>