clk: imx93: drop of_match_ptr

There is build warning when CONFIG_OF is not selected.
>> drivers/clk/imx/clk-imx93.c:324:34: warning: 'imx93_clk_of_match'
>> defined but not used [-Wunused-const-variable=]
324 | static const struct of_device_id imx93_clk_of_match[] = {
| ^~~~~~~~~~~~~~~~~~

The driver only support DT table, no sense to use of_match_ptr.

Fixes: 24defbe194b6 ("clk: imx: add i.MX93 clk")
Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Peng Fan <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Abel Vesa <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/imx/clk-imx93.c

···
 	.driver = {
 		.name = "imx93-ccm",
 		.suppress_bind_attrs = true,
-		.of_match_table = of_match_ptr(imx93_clk_of_match),
+		.of_match_table = imx93_clk_of_match,
 	},
 };
 module_platform_driver(imx93_clk_driver);