[PATCH -next v2] clk: Fix one kernel-doc comment

[Stephen Boyd]

Quoting Yang Li (2022-11-21 18:38:26)
> drivers/clk/sunxi-ng/ccu_mmc_timing.c:54: warning: expecting prototype for sunxi_ccu_set_mmc_timing_mode(). Prototype was for sunxi_ccu_get_mmc_timing_mode() instead
> 
> Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3230
> Reported-by: Abaci Robot <abaci at linux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee at linux.alibaba.com>
> ---

Reviewed-by: Stephen Boyd <sboyd at kernel.org>