They hurt timing forcing signals to come from the master and back
again in one cycle. Stall isn't sampled by the master unless there
is an active cycle so masking it with cyc is pointless. Masking acks
is somewhat pointless too as we don't handle early dropping of cyc
in any of our slaves properly anyways.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
The rx synchronizers were ... non existent. Someone forgot to add
a if rising_edge(clk) to the process.
For tx, ensure that we have a default value so that TX stays high
from TPGA configuration to the reset being sampled on the first clock
cycle.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
