arm64: dts: qcom: Add support for Pixel 3 and Pixel 3 XL

arm64: dts: qcom: Add support for Pixel 3 and Pixel 3 XL

This adds initial device tree support for the following phones:

 - Google Pixel 3 (blueline)
 - Google Pixel 3 XL (crosshatch)

Both phone boards use the same identifiers and differ only slightly
in their connected peripherals.

Supported functionality includes:
 - Debug UART
 - UFS
 - USB-C (peripheral mode)
 - Framebuffer (both u-boot and Linux)
 - Display (Pixel 3 only, and the driver needs work)
 - GPU
 - Bluetooth
 - Wi-Fi

The rmtfs region is allocated using UIO, making it technically "dynamic."

Its address and size can be read from sysfs:

$ cat /sys/class/uio/uio0/name
/sys/class/uio/uio0/maps/map0/addr
0x00000000f2701000

$ cat /sys/class/uio/uio0/maps/map0/size
0x0000000000200000

Like the OnePlus 6, the Pixel 3 requires 1 kB of reserved memory on either
side of the rmtfs region to work around an XPU bug that would otherwise
cause erroneous violations when accessing the rmtfs_mem region.

Co-developed-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Co-developed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Co-developed-by: Casey Connolly <casey@connolly.tech>
Signed-off-by: Casey Connolly <casey@connolly.tech>
Co-developed-by: Joel Selvaraj <foss@joelselvaraj.com>
Signed-off-by: Joel Selvaraj <foss@joelselvaraj.com>
Co-developed-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Co-developed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20251214-pixel-3-v7-8-b1c0cf6f224d@ixit.cz
Signed-off-by: Bjorn Andersson <andersson@kernel.org>