ASoC: mediatek: mt8195: Set ETDM1/2 IN/OUT to COMP_DUMMY()

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

ASoC: mediatek: mt8195: Set ETDM1/2 IN/OUT to COMP_DUMMY()

ETDM2_IN_BE and ETDM1_OUT_BE are defined as COMP_EMPTY(),
in the case the codec dai_name will be null.

Avoid a crash if the device tree is not assigning a codec
to these links.

[ 1.179936] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[ 1.181065] Mem abort info:
[ 1.181420] ESR = 0x0000000096000004
[ 1.181892] EC = 0x25: DABT (current EL), IL = 32 bits
[ 1.182576] SET = 0, FnV = 0
[ 1.182964] EA = 0, S1PTW = 0
[ 1.183367] FSC = 0x04: level 0 translation fault
[ 1.183983] Data abort info:
[ 1.184406] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[ 1.185097] CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[ 1.185766] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ 1.186439] [0000000000000000] user address but active_mm is swapper
[ 1.187239] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
[ 1.188029] Modules linked in:
[ 1.188420] CPU: 7 UID: 0 PID: 70 Comm: kworker/u32:1 Not tainted 6.14.0-rc4-next-20250226+ #85
[ 1.189515] Hardware name: Radxa NIO 12L (DT)
[ 1.190065] Workqueue: events_unbound deferred_probe_work_func
[ 1.190808] pstate: 40400009 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 1.191683] pc : __pi_strcmp+0x24/0x140
[ 1.192170] lr : mt8195_mt6359_soc_card_probe+0x224/0x7b0
[ 1.192854] sp : ffff800083473970
[ 1.193271] x29: ffff800083473a10 x28: 0000000000001008 x27: 0000000000000002
[ 1.194168] x26: ffff800082408960 x25: ffff800082417db0 x24: ffff800082417d88
[ 1.195065] x23: 000000000000001e x22: ffff800082dbf480 x21: ffff800082dc07b8
[ 1.195961] x20: 0000000000000000 x19: 0000000000000013 x18: 00000000ffffffff
[ 1.196858] x17: 000000040044ffff x16: 005000f2b5503510 x15: 0000000000000006
[ 1.197755] x14: ffff800082407af0 x13: 6e6f69737265766e x12: 692d6b636f6c6374
[ 1.198651] x11: 0000000000000002 x10: ffff80008240b920 x9 : 0000000000000018
[ 1.199547] x8 : 0101010101010101 x7 : 0000000000000000 x6 : 0000000000000000
[ 1.200443] x5 : 0000000000000000 x4 : 8080808080000000 x3 : 303933383978616d
[ 1.201339] x2 : 0000000000000000 x1 : ffff80008240b920 x0 : 0000000000000000
[ 1.202236] Call trace:
[ 1.202545] __pi_strcmp+0x24/0x140 (P)
[ 1.203029] mtk_soundcard_common_probe+0x3bc/0x5b8
[ 1.203644] platform_probe+0x70/0xe8
[ 1.204106] really_probe+0xc8/0x3a0
[ 1.204556] __driver_probe_device+0x84/0x160
[ 1.205104] driver_probe_device+0x44/0x130
[ 1.205630] __device_attach_driver+0xc4/0x170
[ 1.206189] bus_for_each_drv+0x8c/0xf8
[ 1.206672] __device_attach+0xa8/0x1c8
[ 1.207155] device_initial_probe+0x1c/0x30
[ 1.207681] bus_probe_device+0xb0/0xc0
[ 1.208165] deferred_probe_work_func+0xa4/0x100
[ 1.208747] process_one_work+0x158/0x3e0
[ 1.209254] worker_thread+0x2c4/0x3e8
[ 1.209727] kthread+0x134/0x1f0
[ 1.210136] ret_from_fork+0x10/0x20
[ 1.210589] Code: 54000401 b50002c6 d503201f f86a6803 (f8408402)
[ 1.211355] ---[ end trace 0000000000000000 ]---