ipq40xx: add MikroTik LHGG-60ad outdoor 802.11ad (60GHz) dish

LHGG-60ad is IPQ4019 + wil6210 based.

Specification:

- Qualcomm IPQ4019 (717 MHz)
- 256 MB of RAM (DDR3L)
- 16 MB (SPI NOR) of flash
- 1x Gbit ethernet, 802.3af/at POE IN connected through AR8035.
- WLAN: wil6210 802.11ad PCI card
- No USB or SD card ports
- UART disabled
- 8x LEDs

Biggest news is the wil6210 PCI card.
Integration for its configuration and detection has already been taken
care of when adding support for TP-Link Talon AD7200.
However, signal quality is much lower than with stock firmware, so
probably additional board-specific data has to be provided to the
driver and is still missing at the moment.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
[Fix Ethernet Interface]
Signed-off-by: Nick Hainke <vincent@systemli.org>

target/linux/ipq40xx/patches-5.4/901-arm-boot-add-dts-files.patch

@@ -10,7 +10,7 @@ Signed-off-by: John Crispin <john@phrozen.org>
 
 --- a/arch/arm/boot/dts/Makefile
 +++ b/arch/arm/boot/dts/Makefile
-@@ -837,11 +837,67 @@ dtb-$(CONFIG_ARCH_QCOM) += \
+@@ -837,11 +837,68 @@ dtb-$(CONFIG_ARCH_QCOM) += \
  	qcom-apq8074-dragonboard.dtb \
  	qcom-apq8084-ifc6540.dtb \
  	qcom-apq8084-mtp.dtb \
@@ -55,6 +55,7 @@ Signed-off-by: John Crispin <john@phrozen.org>
 +	qcom-ipq4019-fritzrepeater-3000.dtb \
 +	qcom-ipq4019-hap-ac3.dtb \
 +	qcom-ipq4019-map-ac2200.dtb \
++	qcom-ipq4019-lhgg-60ad.dtb \
 +	qcom-ipq4019-mr8300.dtb \
 +	qcom-ipq4019-e2600ac-c1.dtb \
 +	qcom-ipq4019-e2600ac-c2.dtb \