iommu: arm-smmu-debug: Fix formatting errors for dev_info

This patch changes '%lx' and '%llx' to '%x' to match the
data type.

Change-Id: I41be2b2b80fcfe1e9ee14da8907cba8a6f857a5d
Signed-off-by: Anant Goel <anantg@codeaurora.org>