clk: socfpga: stratix10: fix rate caclulationg for cnt_clks

clk: socfpga: stratix10: fix rate caclulationg for cnt_clks

commit c7ec75ea4d5316518adc87224e3cff47192579e7 upstream.

Checking bypass_reg is incorrect for calculating the cnt_clk rates.
Instead we should be checking that there is a proper hardware register
that holds the clock divider.

Cc: stable@vger.kernel.org
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lkml.kernel.org/r/20190814153014.12962-1-dinguyen@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>