net: dwc_eth_qos: fix double resource leak in eqos_remove()

Not only does eqos_remove() fail to free the buffers that have been
allocated by eqos_probe_resources_core(), it repeats those allocations
and thus drops twice as much memory on the floor.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>