iommu/arm-smmu-v3: Add support for less than one ECMDQ per core

hulk inclusion
category: feature
bugzilla: 174251
CVE: NA

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Due to limited hardware resources, the number of ECMDQs may be less than
the number of cores. If the number of ECMDQs is greater than the number of
numa nodes, ensure that each node has at least one ECMDQ. This is because
ECMDQ queue memory is requested from the NUMA node where it resides, which
may result in better command filling and insertion performance.

The current ECMDQ implementation reuses the command insertion function
arm_smmu_cmdq_issue_cmdlist() of the normal CMDQ. This function already
supports multiple cores concurrent insertion commands.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>