ARM: dts: aspeed: fuji-data64: Enable mac3 controller

ARM: dts: aspeed: fuji-data64: Enable mac3 controller

"mac3" controller was removed from the initial version of fuji-data64
dts because the rgmii setting is incorrect, but dropping mac3 leads to
regression in the existing fuji platform, because fuji.dts simply
includes fuji-data64.dts.

This patch adds mac3 back to fuji-data64.dts to fix the fuji regression[1],
and rgmii settings need to be fixed later.

Fixes: b0f294fdfc3e ("ARM: dts: aspeed: facebook-fuji: Include facebook-fuji-data64.dts")
Link: https://lore.kernel.org/all/79ddc7b9-ef26-4959-9a16-aa4e006eb145@roeck-us.net/
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>