drm/i915/dg2: Drop one PCI ID

The bspec was recently updated to remove PCI ID 0x5698; this ID is
actually reserved for future use and should not be treated as DG2-G11.

Bspec: 44477
Fixes: 8618b848 ("drm/i915: DG2 and ATS-M device ID updates")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230208200905.680865-1-matthew.d.roper@intel.com