fbdev: do not allow VESA modes without compiled-in drivers

Do not accept VESA modes by the "vga=" kernel parameter if there is no
frame buffer driver compiled-in to handle it.

Also, there is a comment added to the Kconfig description after Werner
Lemberg's suggestion

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13249

Signed-off-by: Krzysztof Helt <[email protected]>
Reported-by: Werner Lemberg <[email protected]>
Cc: Michal Januszewski <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
1 file changed