perf: arm_spe: Use new PMSIDR_EL1 register enums

Now that the SPE register definitions include enums for some PMSIDR_EL1
fields, use them in the driver in place of magic values.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20220825-arm-spe-v8-7-v4-5-327f860daf28@kernel.orgSigned-off-by: Will Deacon <will@kernel.org>

drivers/perf/arm_spe_pmu.c

@@ -1006,32 +1006,32 @@ static void __arm_spe_pmu_dev_probe(void *info)
 	/* This field has a spaced out encoding, so just use a look-up */
 	fld = FIELD_GET(PMSIDR_EL1_INTERVAL, reg);
 	switch (fld) {
-	case 0:
+	case PMSIDR_EL1_INTERVAL_256:
 		spe_pmu->min_period = 256;
 		break;
-	case 2:
+	case PMSIDR_EL1_INTERVAL_512:
 		spe_pmu->min_period = 512;
 		break;
-	case 3:
+	case PMSIDR_EL1_INTERVAL_768:
 		spe_pmu->min_period = 768;
 		break;
-	case 4:
+	case PMSIDR_EL1_INTERVAL_1024:
 		spe_pmu->min_period = 1024;
 		break;
-	case 5:
+	case PMSIDR_EL1_INTERVAL_1536:
 		spe_pmu->min_period = 1536;
 		break;
-	case 6:
+	case PMSIDR_EL1_INTERVAL_2048:
 		spe_pmu->min_period = 2048;
 		break;
-	case 7:
+	case PMSIDR_EL1_INTERVAL_3072:
 		spe_pmu->min_period = 3072;
 		break;
 	default:
 		dev_warn(dev, "unknown PMSIDR_EL1.Interval [%d]; assuming 8\n",
 			 fld);
 		fallthrough;
-	case 8:
+	case PMSIDR_EL1_INTERVAL_4096:
 		spe_pmu->min_period = 4096;
 	}
 
@@ -1050,10 +1050,10 @@ static void __arm_spe_pmu_dev_probe(void *info)
 		dev_warn(dev, "unknown PMSIDR_EL1.CountSize [%d]; assuming 2\n",
 			 fld);
 		fallthrough;
-	case 2:
+	case PMSIDR_EL1_COUNTSIZE_12_BIT_SAT:
 		spe_pmu->counter_sz = 12;
 		break;
-	case 3:
+	case PMSIDR_EL1_COUNTSIZE_16_BIT_SAT:
 		spe_pmu->counter_sz = 16;
 	}