From: "Luiz Fernando N. Capitulino" <lcapitulino@prefeitura.sp.gov.br>

Fix this:

drivers/video/tdfxfb.c:1005: warning: `tdfxfb_cursor' defined but not used

and make the acceleration function selectable (like hgafb and tridentfb)

Geert says:

 tdfxfb_cursor() was not used before, causing a compiler warning. 
 tdfxfb_cursor() may work, but we don't know, so we didn't dare to enable it
 by default.  Now the user (he who has the hardware) can enable it, and tell
 us whether it works or not.