clk: fixed-rate: Remove clk_register_fixed_rate_with_accuracy()

There aren't any users of this API anymore. Remove it.

Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190830150923.259497-4-sboyd@kernel.org