Add the "chassis-type" to msm8916-samsung-serranove and
sm7225-fairphone-fp4 that were posted before the patch that added the
chassis-type to existing device trees, but merged after it.

Also, looks like sdm636-sony-xperia-ganges-mermaid was missing in
commit eaa744b1 ("arm64: dts: qcom: add 'chassis-type' property")
so add it there as well.

Cc: Luca Weiss <luca@z3ntu.xyz>
Cc: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211025102224.23746-1-stephan@gerhold.net