clk: zynqmp: divider: Fix zynqmp_clk_divider_determine_rate kerneldoc

clk: zynqmp: divider: Fix zynqmp_clk_divider_determine_rate kerneldoc

After renaming round_rate->determine, kerneldoc does not match anymore,
causing W=1 warnings:

  Warning: drivers/clk/zynqmp/divider.c:122 function parameter 'req' not described in 'zynqmp_clk_divider_determine_rate'
  Warning: drivers/clk/zynqmp/divider.c:122 expecting prototype for zynqmp_clk_divider_round_rate(). Prototype was for zynqmp_clk_divider_determine_rate() instead

Fixes: 0f9cf96a01fd ("clk: zynqmp: divider: convert from round_rate() to determine_rate()")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>