intel/cannonlake_rvp: Modify memory parameters to support LP4 board

Replace the support for Cannonlake U DDR4 board to Cannonlake U LPDDR4
platform.

TEST=Able to boot up on CNL U LPDDR RVP.

Change-Id: I2a3dd39875705dcb93a60ceba7c143e3e5328148
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/22001
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed