net: macb: Add DMA 64-bit address support for macb
Enable 32-bit or 64-bit DMA in the macb driver based on the macb hardware compatibility and it is configured with structure macb_config in the driver. The Microchip PolarFire SoC Memory Protection Unit(MPU) gives the 64-bit DMA access with the GEM, the MPU transactions on the AXI bus is 64-bit not 32-bit So 64-bit DMA is enabled for the Microchip PolarFire SoC GEM. Signed-off-by: NPadmarao Begari <padmarao.begari@microchip.com> Reviewed-by: NAnup Patel <anup.patel@wdc.com> Tested-by: NBin Meng <bin.meng@windriver.com>
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