Adam Jackson authored Apr 26, 2010 and Keith Packard committed Apr 27, 2010

Banked framebuffers are so 1990.  As of 7.4 the only drivers remaining
that used this were chips, neomagic, trident, and vesa.  vesa only used
it when not using shadowfb, which is broadly undesirable anyway, and no
longer uses it at all as of 2.3.0.  neomagic never used it by default,
and support for it is gone in git master.  The other two effectively
only ever used it for ISA chips; since ISA support is now gone from
the server, they have been modified to only compile mibank support when
ISA support is available.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>