iommu: arm-smmu: Remove check for hibernation and secure use case

Hibernation with secure use case can be supported with hyp_assign
tracker. It is being committed as part of separate patch. Hence,
remove this particular check.

Change-Id: Id76e0d4544d82acb889dc8b803e795cca6762350
Signed-off-by: Omkar Savagaonkar <omkars@codeaurora.org>