clk: imx8mp: drop of_match_ptr from of_device_id table

The driver can match only via the DT table so the table should be always
used and the of_match_ptr does not have any sense (this also allows ACPI
matching via PRP0001, even though it might be not relevant here).  This
fixes compile warning (!CONFIG_OF && !CONFIG_MODULES):

    drivers/clk/imx/clk-imx8mp.c:751:34: warning:
        ‘imx8mp_clk_of_match’ defined but not used [-Wunused-const-variable=]
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk-imx8mp.c

@@ -763,7 +763,7 @@ static struct platform_driver imx8mp_clk_driver = {
 		 * reloading the driver will crash or break devices.
 		 */
 		.suppress_bind_attrs = true,
-		.of_match_table = of_match_ptr(imx8mp_clk_of_match),
+		.of_match_table = imx8mp_clk_of_match,
 	},
 };
 module_platform_driver(imx8mp_clk_driver);