dev: gcdb: display: remove macros for MIN and MAX vco frequency

Use variables for MIN and MAX VCO frequencies so that they can
be configured to change the frequency range. Add necessary
condition checks to configure the VCO frequency
range for zero and 90 phase.

Change-Id: Ib6e5deef73b22d05a86c4b5da4f836ee41cb8e49
2 files changed