drm/i915/dg2: UHBR tables added for pll programming

UHBR modes has higher link rate and added new values for programming
mpll of SNPS phy. No change in sequence, only the pll parameters
are different for UHBR modes.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210827103843.527-1-jani.nikula@intel.com