drm/i915/lt_phy: Create macro for LT PHY PLL state

drm/i915/lt_phy: Create macro for LT PHY PLL state

Create a macro for PLL state for LT PHY similar as
for cx0 case.

v2:
- Move addition of LT_PHY_PLL_DP/HDMI_PARAMS() to this patch.
- Fix end of table checking while looking up a table.

Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260119093757.2850233-8-mika.kahola@intel.com