arm64: early_alloc: Fix check for allocation failure
In early_alloc we check if the memblock_alloc failed by checking the virtual address of the result, which will never fail. This patch fixes it to check the actual result for failure. Acked-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NSuzuki K. Poulose <suzuki.poulose@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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