iommu/arm-smmu-qcom: Register the TBU driver in qcom_smmu_impl_init

iommu/arm-smmu-qcom: Register the TBU driver in qcom_smmu_impl_init

Currently the TBU driver will only probe when CONFIG_ARM_SMMU_QCOM_DEBUG
is enabled. The driver not probing would prevent the platform to reach
sync_state and the system will remain in sub-optimal power consumption
mode while waiting for all consumer drivers to probe. To address this,
let's register the TBU driver in qcom_smmu_impl_init(), so that it can
probe, but still enable its functionality only when the debug option in
Kconfig is enabled.

Reported-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Closes: https://lore.kernel.org/r/CAA8EJppcXVu72OSo+OiYEiC1HQjP3qCwKMumOsUhcn6Czj0URg@mail.gmail.com
Fixes: 414ecb030870 ("iommu/arm-smmu-qcom-debug: Add support for TBUs")
Signed-off-by: Georgi Djakov <quic_c_gdjako@quicinc.com>
Link: https://lore.kernel.org/r/20240704010759.507798-1-quic_c_gdjako@quicinc.com
Signed-off-by: Will Deacon <will@kernel.org>