radv/entrypoints: Only generate entrypoints for supported features

radv/entrypoints: Only generate entrypoints for supported features

This changes the way radv_entrypoints_gen.py works from generating a
table containing every single entrypoint in the XML to just the ones
that we actually need.  There's no reason for us to burn entrypoint
table space on a bunch of NV extensions we never plan to implement.

RADV implements VK_AMD_draw_indirect_count, so add that to the list.

Port of 114c281e707919a1420d3a20219ce4392d8b360d
"and/entrypoints: Only generate entrypoints for supported features"

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Dave Airlie <airlied@redhat.com>