perf: imx9_perf: make the read-only array mask static const

Don't populate the read-only array mask on the stack at run time,
instead make it static const.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250611133917.170888-1-colin.i.king@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>

Author: ColinIanKing

drivers/perf/fsl_imx9_ddr_perf.c

@@ -461,9 +461,11 @@ static void imx93_ddr_perf_monitor_config(struct ddr_pmu *pmu, int event,
 					  int counter, int axi_id, int axi_mask)
 {
 	u32 pmcfg1, pmcfg2;
-	u32 mask[] = {  MX93_PMCFG1_RD_TRANS_FILT_EN,
-			MX93_PMCFG1_WR_TRANS_FILT_EN,
-			MX93_PMCFG1_RD_BT_FILT_EN };
+	static const u32 mask[] = {
+		MX93_PMCFG1_RD_TRANS_FILT_EN,
+		MX93_PMCFG1_WR_TRANS_FILT_EN,
+		MX93_PMCFG1_RD_BT_FILT_EN
+	};
 
 	pmcfg1 = readl_relaxed(pmu->base + PMCFG1);