drm/i915/bios: Parse the seamless DRRS min refresh rate

Extract the seamless DRRS min refresh rate from the VBT.

v2: Do a version check

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220504150440.13748-9-ville.syrjala@linux.intel.com