fix the wrong defines for the ZQ field of MPDDRC_CR in the include/arch/at91_ddrsdrc.h.

They were codeed as if they were binary, but they are in hex.

This code was introduced on 2013-11-28, Commit: "driver: ddramc: add driver to support the low_power DDR2-SDRAM device",

Reported by rwille from the github: linux4sam/at91bootstrap

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
board: sama5d3xek: change the macros used to generate the values for the registers t0pr, t1pr and t2pr in lpddr2_reg_config()

The macro changes of commit: "at91_ddrsdrc: improve the macro definition of the MPDDRC timming parameter register",
broke the lpddr2_reg_config() function in board/sama5d3xek/sama5d3xek.c.

Reported by rwille from the github: linux4sam/at91bootstrap

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>