drm/i915/snps_hdmi_pll: Use clamp() instead of max(min())

drm/i915/snps_hdmi_pll: Use clamp() instead of max(min())

The values of ana_cp_int, and ana_cp_prop are clamped between 1 and 127.
Use the more intuitive and readable clamp() macro instead of using
nested max(min(...)).

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://lore.kernel.org/r/20250618130951.1596587-3-ankit.k.nautiyal@intel.com