ipq806x: fix dtc warnings for Linksys E8350 V1

ipq806x: fix dtc warnings for Linksys E8350 V1

- Add missing #address-cells and #size-cells to the partitions node
- Remove redundant #address-cells and #size-cells for the nand node

This patch fixes the following dtc warnings:

qcom-ipq8064-e8350-v1.dts:85.3-13: Warning (reg_format): /soc/nand-controller@1ac00000/nand@0:reg: property has invalid length (4 bytes) (#address-cells == 1, #size-cells == 1)
qcom-ipq8064-e8350-v1.dts:95.5-25: Warning (reg_format): /soc/nand-controller@1ac00000/nand@0/partitions/partition@0:reg: property has invalid length (8 bytes) (#address-cells == 2, #size-cells == 1)
qcom-ipq8064-e8350-v1.dts:99.5-33: Warning (reg_format): /soc/nand-controller@1ac00000/nand@0/partitions/partition@4000000:reg: property has invalid length (8 bytes) (#address-cells == 2, #size-cells == 1)

Signed-off-by: Shiji Yang <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18989
Signed-off-by: Christian Marangi <[email protected]>