perf: arm_spe: Prevent module unload while the PMU is in use

When the PMU driver is built as a module, the perf expects the
pmu->module to be valid, so that the driver is prevented from
being unloaded while it is in use. Fix the SPE pmu driver to
fill in this field.

Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

drivers/perf/arm_spe_pmu.c

@@ -889,6 +889,7 @@ static int arm_spe_pmu_perf_init(struct arm_spe_pmu *spe_pmu)
 	struct device *dev = &spe_pmu->pdev->dev;
 
 	spe_pmu->pmu = (struct pmu) {
+		.module = THIS_MODULE,
 		.capabilities	= PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE,
 		.attr_groups	= arm_spe_pmu_attr_groups,
 		/*