ARM: dts: qcom: Drop input-name property

This property doesn't seem to exist in the documentation nor
in source code, but for some reason it is defined in a bunch
of device trees.

Signed-off-by: Dang Huynh <danct12@riseup.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211123161919.1506755-1-danct12@riseup.net