The following patch automatically adds CONFIG_FBCON_CFB[8,16,32] 
if the tridentfb driver (CONFIG_FB_TRIDENT) was selected.
Without the patch I get:
	fbcon_setup: No support for fontwidth 8
	kernel: fbcon_setup: type 0 (aux 0, depth 8) not supported
and the screen stays black in case tridentfb was the only selected fb-driver.

The second part of the patch only inserts named initializers for some structs
in tridentfb.c.

Helge