arm64: dts: qcom: talos-evk: Add support for QCS615 talos evk board

arm64: dts: qcom: talos-evk: Add support for QCS615 talos evk board

Add the device tree for the QCS615-based Talos EVK platform. The
platform is composed of a System-on-Module following the SMARC
standard, and a Carrier Board.

The Carrier Board supports several display configurations, HDMI and
LVDS. Both configurations use the same base hardware, with the display
selection controlled by a DIP switch.

Use a DTBO file, talos-evk-lvds-auo,g133han01.dtso, which defines an
overlay that disables HDMI and adds LVDS. The DTs file talos-evk
can describe the HDMI display configurations.

According to the hardware design and vendor guidance, the WiFi PA
supplies VDD_PA_A and VDD_PA_B only need to be enabled at the same time
as asserting WLAN_EN.

On this platform, WiFi enablement is controlled via the WLAN_EN GPIO
(GPIO84), which also drives the VDD_PA_A and VDD_PA_B power enables.
Remove the VDD_PA_A and VDD_PA_B regulator nodes from the device tree
and rely on WLAN_EN to enable WiFi functionality.

Add talos-evk-usb1-peripheral.dtso overlay to enable USB0 peripheral
(EDL) mode. The base DTS will keep USB0 host-only due to hardware
routing through the EDL DIP switch, and the overlay switches the
configuration for device-mode operation.

The LVDS backlight hardware has been updated to use a simplified
design. The backlight enable signal is now permanently pulled up
to 3.3V and is no longer controlled via GPIO59.

Remove the GPIO59 based backlight configuration from the device
tree, as it is no longer routed to the LVDS interface.

The initial device tree includes support for:
- CPU and memory
- UART
- GPIOs
- Regulators
- PMIC
- Early console
- AT24MAC602 EEPROM
- MCP2515 SPI to CAN
- ADV7535 DSI-to-HDMI bridge
- DisplayPort interface
- SN65DSI84ZXHR DSI-to-LVDS bridge
- Wi-Fi/BT

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Sudarshan Shetty <tessolveupstream@gmail.com>
Link: https://lore.kernel.org/r/20260331060107.501561-4-tessolveupstream@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>