Revert "fbcon: bgcolor fix"

This reverts commit 2d04a4a7, which made
it impossible to make the softcursor use the highlight colors.

Yes, the fourth bit should be "blinking", but since we cannot reasonably
blink in fbcon, highlighting it with a bright background is preferable.

Reported-by: Pavel Machek <pavel@suse.cz>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Antonino A. Daplas <adaplas@pol.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>