qualcommax: ipq50xx: ax6000: enable pcie1 for QCA9887

The Xiaomi AX6000 has three radios:
  - IPQ5018 integrated 2.4 GHz (ath11k AHB, wifi0)
  - QCN9024 on PCIe0 (ath11k PCI, QCA8074-class 5 GHz)
  - QCA9887 on PCIe1 (ath10k, 5 GHz)

The DTS previously kept pcie1 disabled because the controller
could not bring the link up. The real cause was the PERST GPIO
polarity: the stock device-tree uses GPIO_ACTIVE_HIGH on GPIO18
for the QCA9887 card, while OpenWrt had GPIO_ACTIVE_LOW, leaving
the card held in reset.

With the correct polarity the PCIe1 link trains and the QCA9887
enumerates at 01:00.0. ath10k loads firmware-2.bin, registers
phy0 with mac80211, and provides a functional 5 GHz AP.

Tested on a reworked Xiaomi AX6000 with QCA9887 soldered in.
All three radios enumerate, load firmware and beacon
successfully; scan, association and data traffic confirmed on
each radio.

Signed-off-by: chinawrj <chinawrj@gmail.com>
Link: openwrt/openwrt#23047
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 1bc0392)

Author: chinawrj

target/linux/qualcommax/files/arch/arm64/boot/dts/qcom/ipq5018-ax6000.dts

@@ -549,13 +549,9 @@
 };
 
 &pcie1 {
-	/*
-	 * although the pcie1 phy probes successfully, the controller is unable
-	 * to bring it up. So let's disable it until a solution is found.
-	 */
-	status = "disabled";
+	status = "okay";
 
-	perst-gpios = <&tlmm 18 GPIO_ACTIVE_LOW>;
+	perst-gpios = <&tlmm 18 GPIO_ACTIVE_HIGH>;
 
 	pcie@0 {
 		wifi@0,0 {