iommu/amd: Fix ivrs_base memleak in early_amd_iommu_init()

Fix a permanent ACPI table memory leak in early_amd_iommu_init() when
CMPXCHG16B feature is not supported

Fixes: 82582f85 ("iommu/amd: Disable AMD IOMMU if CMPXCHG16B feature is not supported")
Cc: stable@vger.kernel.org
Signed-off-by: Zhen Ni <zhen.ni@easystack.cn>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20250822024915.673427-1-zhen.ni@easystack.cn


Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>