perf: arm_dsu: Fix hotplug callback leak in dsu_pmu_init()

perf: arm_dsu: Fix hotplug callback leak in dsu_pmu_init()

[ Upstream commit 8ad871026b0412becf7a1bc051736d23561c2d76 ]

dsu_pmu_init() won't remove the callback added by cpuhp_setup_state_multi()
when platform_driver_register() failed. Remove the callback by
cpuhp_remove_multi_state() in fail path.

Similar to the handling of arm_ccn_init() in commit 1ce9d73cb30d ("bus:
arm-ccn: Prevent hotplug callback leak")

Fixes: 166459eeac54 ("perf: ARM DynamIQ Shared Unit PMU support")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20221115070207.32634-2-yuancan@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>