FROMGIT: arm64: dts: mt8192-asurada-spherion: Add Synaptics trackpad support

Some spherion variants use Synaptics trackpad at address 0x2c in the
I2C2 bus with the generic HID-over-i2c driver, and this cannot be
distinguished from the firmware compatible string.

Support both trackpads in the same devicetree by moving the trackpad
pinctrl property to i2c2 and adding the node for Synaptics trackpad.

Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20240912154451.3447081-1-treapking@chromium.org


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
(cherry picked from commit 925ebc0c
 git://git.kernel.org/pub/scm/linux/kernel/git/mediatek/linux.git v6.12-next/dts64)

BUG=b:364635400, b:358684733, b:364784522
TEST=CQ

Change-Id: I4a6f1e1d984b41dc31355613c572c5d091d3859f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/5907328


Commit-Queue: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sean Paul <sean@poorly.run>
Tested-by: Pin-yen Lin <treapking@chromium.org>
Signed-off-by: Mateusz Urbańczyk <urbanczyk@google.com>