drm/i915/xe3p_lpd: Drop support for interlace mode

drm/i915/xe3p_lpd: Drop support for interlace mode

Interlace mode is officially removed from HW from Xe3p_LPD.  The
register TRANS_VSYNCSHIFT and the bits in TRANS_CONF are now removed, so
make sure we do not set/get these anymore.

Bspec: 69961, 70000
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20251103-xe3p_lpd-basic-enabling-v3-10-00e87b510ae7@intel.com
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>