The function imx8mm_clocks_probe() has two main issues:
- The of_iomap() function may cause a memory leak.
- Memory allocated for 'clk_hw_data' may not be freed properly
in some paths.
To fix these issues, this commit replaces the use of of_iomap()
with devm_of_iomap() and replaces kzalloc() with devm_kzalloc().
This ensures that all memory is properly managed and automatically
freed when the device is removed.
In addition, when devm_of_iomap() allocates memory with an error,
it will first jump to label "unregister_hws" and
then return PTR_ ERR(base).
Fixes: 9c71f9ea35d7 ("clk: imx: imx8mm: Switch to clk_hw based API")
Fixes: ba5625c3e272 ("clk: imx: Add clock driver support for imx8mm")
Signed-off-by: Zhou Shide<u201911681@xxxxxxxxxxx>