thermal/drivers/cpufreq_cooling: Fix slab OOB issue

In the Linux kernel, the following vulnerability has been resolved:

thermal/drivers/cpufreq_cooling: Fix slab OOB issue

Slab OOB issue is scanned by KASAN in cpu_power_to_freq().

If power is limited below the power of OPP0 in EM table,

it will cause slab out-of-bound issue with negative array

index.

Return the lowest frequency if limited power cannot found

a suitable OPP in EM table to fix this issue.

Backtrace:

[<ffffffd02d2a37f0>] die+0x104/0x5ac

[<ffffffd02d2a5630>] bug_handler+0x64/0xd0

[<ffffffd02d288ce4>] brk_handler+0x160/0x258

[<ffffffd02d281e5c>] do_debug_exception+0x248/0x3f0

[<ffffffd02d284488>] el1_dbg+0x14/0xbc

[<ffffffd02d75d1d4>] __kasan_report+0x1dc/0x1e0

[<ffffffd02d75c2e0>] kasan_report+0x10/0x20

[<ffffffd02d75def8>] __asan_report_load8_noabort+0x18/0x28

[<ffffffd02e6fce5c>] cpufreq_power2state+0x180/0x43c

[<ffffffd02e6ead80>] power_actor_set_power+0x114/0x1d4

[<ffffffd02e6fac24>] allocate_power+0xaec/0xde0

[<ffffffd02e6f9f80>] power_allocator_throttle+0x3ec/0x5a4

[<ffffffd02e6ea888>] handle_thermal_trip+0x160/0x294

[<ffffffd02e6edd08>] thermal_zone_device_check+0xe4/0x154

[<ffffffd02d351cb4>] process_one_work+0x5e4/0xe28

[<ffffffd02d352f44>] worker_thread+0xa4c/0xfac

[<ffffffd02d360124>] kthread+0x33c/0x358

[<ffffffd02d289940>] ret_from_fork+0xc/0x18