clk: fixed-rate: fix clk_hw_register_fixed_rate_with_accuracy_parent_hw

Add missing comma and remove extraneous NULL argument. The macro is
currently used by no one which explains why the typo slipped by.

Fixes: 2d34f09e ("clk: fixed-rate: Add support for specifying parents via DT/pointers")
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20231218-mbly-clk-v1-1-44ce54108f06@bootlin.com


Signed-off-by: Stephen Boyd <sboyd@kernel.org>