spi: spi-geni-qcom: Print an error when we timeout setting the CS

If we're using geni to manage the chip select line (don't do it--use a
GPIO!) and we happen to get a timeout waiting for the chip select
command to be completed, no errors are printed even though things
might not be in the best shape.  Let's add a print.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20201217142842.v3.4.I666b37646de9652cef438ac7c2c6c2053367fc6b@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>