iommu: rockchip: Allocate tables from all available memory for IOMMU v2

IOMMU v2 found in newer Rockchip SoCs, e.g. RK356x and RK3588, support
placing directory and page tables in up to 40-bit addressable physical
memory.

Remove the use of GFP_DMA32 flag for IOMMU v2 now that the physical
address to the directory table is correctly written to DTE_ADDR.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20230617182540.3091374-3-jonas@kwiboo.se


Signed-off-by: Joerg Roedel <jroedel@suse.de>