drm/i915/intel_sdvo: Drop call to intel_panel_fixed_mode() from compute_config

drm/i915/intel_sdvo: Drop call to intel_panel_fixed_mode() from compute_config

Currently, in intel_sdvo_compute_config(), intel_panel_fixed_mode() is
called to get the fixed mode. However, since the call is made after
intel_panel_compute_config, that copies the selected fixed mode to the
adjusted mode, we can directly use the crtc_state->hw.adjusted_mode.

So remove the extra call to intel_panel_fixed_mode() and use adjusted
mode instead.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260430131220.3891497-5-ankit.k.nautiyal@intel.com