66AK 设置DDR3 ODT，需要配置DDR_TERM，DYN_ODT
27-25 DDR_TERM RW Defines termination resistor value.
• 0 = Disables termination
• 1 = RZQ/4
• 2 = RZQ/2
• 3 = RZQ/6
• 4 = RZQ/12
• 5 = RZQ/8
DYN_ODT RW Dynamic On-Die Termination
• 0 = Turn off dynamic ODT.
• 1 = RZQ/4
• 2 = RZQ/2
RZQ为240R情况下，需要将ODT配置我60R，DDR_TERM，DYN_ODT该这么配
