If HTI (also sometimes called HDPORT) is enabled at startup, it may be
using some of the PHYs and DPLLs making them unavailable for general
usage.  Let's read out the HDPORT_STATE register and avoid making use of
resources that HTI is already using.

v2:
 - Fix minor checkpatch warnings

v3:
 - Just readout HDPORT_STATE register once during init and then parse it
   later as needed.
 - Add a 'has_hti' device info flag to track whether we should readout
   HDPORT_STATE or not.  We can skip the platform/flag tests later since
   the hti_state in dev_priv will remain 0 for platforms it does not
   apply to.
 - Move PLL masking into icl_get_combo_phy_dpll() since at the moment
   RKL is the only platform that has HTI.  (Jose)

Bspec: 49189
Bspec: 53707
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716220551.2730644-5-matthew.d.roper@intel.comReviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>