ARM: dts: qcom-msm8974-{"hon","am"}ami: Commonize and modernize the DTs

Sony Xperia Z1 and Z1 compact are almost identical, and that shows in
their DTs. Commonize the repeating parts and modernize the DTs to use
labels.

As a bonus, Z1C gains touchscreen support in this commit, as it was
present on Z1 already.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
[bjorn: Rebased on top of Krzysztof's fixes]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220415115633.575010-13-konrad.dybcio@somainline.org