[PATCH RFC 2/3] wifi: ath12k: honour disable-rfkill from the device tree

[Franz <franzelfranzel@gmail.com>]

ath12k_core_rfkill_config() skips the hardware rfkill setup only when
ACPI says so. DT-based boards have no equivalent. On the Microsoft
Surface Pro 11 (X1E80100), the WCN7850 rfkill input reads as "radio
off", so the interface is hard-blocked:

  iwd: Error bringing interface 4 up: Operation not possible due to RF-kill

Also skip the setup when the device's DT node has "disable-rfkill". The
PCI core attaches the node to the pci_dev, so ab->dev->of_node sees it.

Tested on a Surface Pro 11 with next-20260929 and the matching DT
change: the interface comes up and connects (5 GHz, 160 MHz).

Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Franz <franzelfranzel@gmail.com>
---
 drivers/net/wireless/ath/ath12k/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 0c72948f3..8cac84917 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -83,6 +83,9 @@ static int ath12k_core_rfkill_config(struct ath12k_base *ab)
 	if (ath12k_acpi_get_disable_rfkill(ab))
 		return 0;
 
+	if (of_property_read_bool(ab->dev->of_node, "disable-rfkill"))
+		return 0;
+
 	for (i = 0; i < ab->num_radios; i++) {
 		ar = ab->pdevs[i].ar;
 
-- 
2.56.0