rk3566: ddr: update ultra ddrbin to v1.20

build from:
328b43930e rk356x: ddr: en lp4/4x rx odt when freq greater than 600MHz

build command:
./make.sh rk3568

update feature:
1. Fixed 6GB LPDDR4/

rk3566: ddr: update ultra ddrbin to v1.20

build from:
328b43930e rk356x: ddr: en lp4/4x rx odt when freq greater than 600MHz

build command:
./make.sh rk3568

update feature:
1. Fixed 6GB LPDDR4/4x initialization failure problem.
2. LPDDR4/4X enable 780MHz read odt。
3. Eanble read/write vref training to improve
compatibility.(can be disable using ddrbin_tool).
4. Fixed issue that CA training may be missed during reboot.

Signed-off-by: Tang Yun ping <typ@rock-chips.com>
Change-Id: I6e4d68add07b38746f4aaf04591bbf090f5177f6

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