drm/i915/display_wa: Add helpers to check wa

Introduce a generic helper to check display workarounds using an enum.

Convert Wa_16023588340 to use the new interface, simplifying WA checks
and making future additions easier.

v2: Use drm_WARN instead of MISSING_CASE and simplify intel_display_wa
macro. (Jani)
v3: Print Missing wa number, instead of enum value. (Gustavo, Jani)

Suggested-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://lore.kernel.org/r/20250711041901.1607823-2-ankit.k.nautiyal@intel.com