fbdev: kconfig update

Update Kconfig for Permedia 2, Trident and 3Dfx frame buffer drivers.

[akpm@linux-foundation.org: fix Kconfig text]
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>