arm64: dts: qcom: Add missing 'chassis-type's

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 eaa744b1c1 ("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

arch/arm64/boot/dts/qcom/msm8916-samsung-serranove.dts

@@ -23,6 +23,7 @@
 / {
 	model = "Samsung Galaxy S4 Mini Value Edition";
 	compatible = "samsung,serranove", "qcom,msm8916";
+	chassis-type = "handset";
 
 	aliases {
 		serial0 = &blsp1_uart2;

arch/arm64/boot/dts/qcom/sdm636-sony-xperia-ganges-mermaid.dts

@@ -11,6 +11,7 @@
 / {
 	model = "Sony Xperia 10 Plus";
 	compatible = "sony,mermaid-row", "qcom,sdm636";
+	chassis-type = "handset";
 
 	/* SDM636 v1 */
 	qcom,msm-id = <345 0>;

arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts

@@ -15,6 +15,7 @@
 / {
 	model = "Fairphone 4";
 	compatible = "fairphone,fp4", "qcom,sm7225";
+	chassis-type = "handset";
 
 	/* required for bootloader to select correct board */
 	qcom,msm-id = <434 0x10000>, <459 0x10000>;