- Merge sys_reset data of LD4, Pro4, sLD8 and Pro5

  - Merge sys_reset data of LD11 and LD20

  - Use primitive UNIPHIER_RESETX() macro because bit assignments for
    system reset will be changed for every SoC in the future

  - Add NAND and eMMC resets
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>