iommu: arm-smmu: Reinitialize context bank structure for secure domains

Reinitialize the arm_smmu_cb structure with new values allocated
during hibernation restore for secure smmu-domains in order to
correctly update the cb registers further in the restore process.

Change-Id: Ia0bd60663f8aaf47e3b905207c0e84d54b5cbdbb
Signed-off-by: Vivek Kumar <vivekuma@codeaurora.org>