arm64: dts: qcom: msm8998-fxtec-pro1: Add Goodix GT9286 touchscreen

This smartphone has a Goodix GT8296 touch IC, reachable at address
0x14 on blsp2 i2c-1.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123823.368199-3-angelogioacchino.delregno@somainline.org