The delay cell result should use DDR clock PLL rate for computation, and should not be divided by 2. This helps to improve DRAM stability. BUG=b:80501386,b:142358843 BRANCH=kukui TEST=Boots correctly on Kukui Change-Id: Idf5cce206e248bb327f9a7d27c4f364ef1c68aa1 Signed-off-by: Huayang Duan <huayang.duan@mediatek.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36990 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>