arm64: dts: qcom: msm8916-gplus-fl8005a: Add touchscreen

FL8005A uses a Focaltech FT5402 touchscreen that is connected to
blsp_i2c5. Add it to the device tree.

Signed-off-by: Lin, Meng-Bo <linmengbo0689@protonmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230107133223.139893-1-linmengbo0689@protonmail.com