drm/i915/display: Extend the max dotclock limit to WCL

drm/i915/display: Extend the max dotclock limit to WCL

Add upper limit check for pixel clock for WCL.

For prior platforms though the bspec mentions the dotclock limits, however
these are intentionally not enforced to avoid regressions, unless real
issues are observed.

BSpec: 49199, 68912
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260202103731.357416-18-ankit.k.nautiyal@intel.com