drm/i915: Fix renamed struct field

drm/i915: Fix renamed struct field

Earlier versions of commit a5b7ef27da60 ("drm/i915: Add struct to hold
IP version") named "ver" as "arch" and then when it was renamed it
missed the rename on MEDIA_VER_FULL() since it it's currently not used.

Fixes: a5b7ef27da60 ("drm/i915: Add struct to hold IP version")
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220316234538.434357-1-lucas.demarchi@intel.com
(cherry picked from commit b4ac33b973233dc08a56c8ef9d3c2edeab7a4370)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>