gpu: host1x: Fix iommu_map_sgtable() return value check

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CVE-2026-74380 · Microsoft / collected KEV context

cve-program · CVE-2026-74380

• https://git.kernel.org/stable/c/5f3985c2a500df3126cb12a2e0ccf26a40bc495d
• https://git.kernel.org/stable/c/3ac173e46ef6fda9c9df8d47cdff4df962df9728
• https://git.kernel.org/stable/c/2a68928c445138961e2c451983b473aeb3f5b999
• https://git.kernel.org/stable/c/79240eee5a40014d9edfabe19f06b35ffa84e5f8
• https://git.kernel.org/stable/c/e024c7993d839503d6c1f0044b8fc537c30300e9
• https://git.kernel.org/stable/c/18f74762013a4b6aa6f905c4459e0f506f9c5c7b

No related operational record is retained in the current change model.