iommu/arm-smmu: Clean up resource handling during Qualcomm context probe

Convert to use devm_platform_ioremap_resource() and fix return value
when platform_get_irq fails.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230705130416.46710-1-frank.li@vivo.com


Signed-off-by: Will Deacon <will@kernel.org>