93% usage, ripple clocks warning

I registered the reset pulse after my counter chain and that fixed one of the warnings.

For the other warning, I swapped in a DFFE for DFF, but now I get negative slack times for clock hold.

In the DFF version, a signal is used to clock a DFF (D=1), Q enables a counter, which (registered) resets the DFF at overflow. Q is high for 64 clocks. Clock hold slack times are 5ns.

For the DFFE version, a signal feeds DFFE enable, clk to clk in, D=1, but this causes clock hold slack times to be negative.