perf/marvell: Fix !CONFIG_OF build for CN10K DDR PMU driver

When compiling the Marvell CN10K DDR PMU driver with CONFIG_OF=n, the
build fails:

  | drivers/perf/marvell_cn10k_ddr_pmu.c:723:35: error: 'cn10k_ddr_pmu_of_match' undeclared here (not in a function); did you mean 'cn10k_ddr_pmu_driver'?

Use `of_match_ptr()` to avoid referencing the non-existent match table
in this configuration.

Link: https://lore.kernel.org/r/202203091424.Vfe8J4W9-lkp@intel.com
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Will Deacon <will@kernel.org>

Author: willdeacon

drivers/perf/marvell_cn10k_ddr_pmu.c

@@ -720,7 +720,7 @@ MODULE_DEVICE_TABLE(of, cn10k_ddr_pmu_of_match);
 static struct platform_driver cn10k_ddr_pmu_driver = {
 	.driver	= {
 		.name   = "cn10k-ddr-pmu",
-		.of_match_table = cn10k_ddr_pmu_of_match,
+		.of_match_table = of_match_ptr(cn10k_ddr_pmu_of_match),
 		.suppress_bind_attrs = true,
 	},
 	.probe		= cn10k_ddr_perf_probe,