arm64: dts: hisilicon: separate each group of data in the property "reg"

Do not write the "reg" of multiple groups of data into a uint32 array,
use <> to separate them. Otherwise, the errors similar to the following
will be reported by reg.yaml.

soc: dsa@c7000000:reg:0: [0, 3305111552, 0, 8978432, 0, 3338665984, 0, \
6291456] is too long

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>