[BUG][CML][RT1011_RT5682] KASAN bug found to play with speaker

[fredoh9]

New KASAN bug found while working on #2168.

• Platform : CML Helios
• Topology: sof-cml-rt1011-rt5682.tplg
• linux build hash: 16d98cd
• KConfig: default + memory-debug-defconfig-
• cmd: aplay -Dhw:0,5 -r 48000 -c 2 -f S16_LE -d 3 /dev/zero -v

[  170.777592] ==================================================================
[  170.777603] BUG: KASAN: stack-out-of-bounds in _find_next_bit.constprop.0+0x3e/0xf0
[  170.777608] Read of size 8 at addr ffff888202d6f530 by task aplay/1757
[  170.777615] CPU: 0 PID: 1757 Comm: aplay Not tainted 5.7.0-rc7-test+ #3
[  170.777617] Hardware name: Google Helios/Helios, BIOS  01/21/2020
[  170.777618] Call Trace:
[  170.777624]  dump_stack+0x76/0xa0
[  170.777629]  print_address_description.constprop.0.cold+0xd3/0x43e
[  170.777634]  ? _raw_spin_lock_irqsave+0x7b/0xd0
[  170.777637]  ? _raw_spin_trylock_bh+0xf0/0xf0
[  170.777640]  ? _find_next_bit.constprop.0+0x3e/0xf0
[  170.777643]  __kasan_report.cold+0x37/0x86
[  170.777647]  ? regmap_readable+0xb0/0xc0
[  170.777650]  ? _find_next_bit.constprop.0+0x3e/0xf0
[  170.777652]  kasan_report+0x38/0x50
[  170.777656]  _find_next_bit.constprop.0+0x3e/0xf0
[  170.777663]  rt1011_set_tdm_slot+0x125/0x5d0 [snd_soc_rt1011]
[  170.777669]  ? rt1011_hw_params+0x2f0/0x2f0 [snd_soc_rt1011]
[  170.777672]  ? mutex_unlock+0x18/0x40
[  170.777691]  snd_soc_dai_set_tdm_slot+0x152/0x210 [snd_soc_core]
[  170.777710]  ? snd_soc_dai_set_fmt+0x80/0x80 [snd_soc_core]
[  170.777717]  cml_rt1011_hw_params+0x20c/0x320 [snd_soc_cml_rt1011_rt5682]
[  170.777735]  snd_soc_link_hw_params+0x59/0x90 [snd_soc_core]
[  170.777752]  soc_pcm_hw_params+0x42c/0xb10 [snd_soc_core]
[  170.777771]  ? soc_pcm_open+0xbd0/0xbd0 [snd_soc_core]

[plbossart]

Probably this sort of code in sound/soc/codecs/rt1011.c

first_bit = find_next_bit((unsigned long *)&rx_mask, 32, 0);

rx_max is declared as unsigned int, this cast is probably just wrong.