arm64: dts: qcom: qcs8300: Add device node for gfx_smmu

Add the device node for gfx smmu that is required for gpu
specific address translations.

Signed-off-by: Pratyush Brahma <quic_pbrahma@quicinc.com>
Link: https://lore.kernel.org/r/20250310-b4-branch-gfx-smmu-v6-2-15c60b8abd99@quicinc.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>