drm/i915/adl_p: Add ddi buf translation tables for combo PHY

ADL-P now has its own set of DDI buf translation tables (except for eDP
which appears to be the same as TGL).  Add the new values (last updated
in bspec 2021-07-22) to the driver.

v2:
 - Actually hook up the new tables via encoder->get_buf_trans()

v3:
 - Create extra table wrapper structures for the tables from past
   platforms that we're re-using, with names that more accurately
   reflect the link rate they apply to on ADL-P specifically.  (Jose)

Bspec: 49291
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Khaled Almahallawy <khaled.almahallawy@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210728221045.2363614-2-matthew.d.roper@intel.com