Remove ramdac

ramdac drivers have been removed from xserver since version 21.0.99.1 and xorg/xserver@f0385fb4 resulting in the following build failure:

In file included from trident_bank.c:37:
trident.h:41:10: fatal error: xf86RamDac.h: No such file or directory
   41 | #include "xf86RamDac.h"
      |          ^~~~~~~~~~~~~~

Fixes:

• http://autobuild.buildroot.org/results/c81ac8075af257e8626d9d097270be7a7b4a1496

Signed-off-by: Fabrice Fontaine fontaine.fabrice@gmail.com