arm64: Do not initialise the fixmap page tables in head.S
The early_ioremap_init() function already handles fixmap pte initialisation, so upgrade this to cover all of pud/pmd/pte and remove one page from swapper_pg_dir. Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com> Tested-by: NJungseok Lee <jungseoklee85@gmail.com>
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