gpu: nova-core: gsp: replace firmware version with "bindings" alias

gpu: nova-core: gsp: replace firmware version with "bindings" alias

We have an "bindings" alias to avoid having to mention the firmware
version again and again, and limit the diff when upgrading the firmware.
Use it where we neglected to.

Fixes: eaf0989c77e4 ("gpu: nova-core: Add bindings required by GSP sequencer")
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20251216-nova-fixes-v3-4-c7469a71f7c4@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>