AT_LEAST_GEN() seems utterluy pointless. Just
compare the numbers the natural way.

Partly done with cocci (until it choked on the
igt magic constructs):
@@
expression devid, ver;
@@
(
- !AT_LEAST_GEN(devid, ver)
+ intel_gen(devid) < ver
|
- AT_LEAST_GEN(devid, ver)
+ intel_gen(devid) >= ver
)

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>