arm64: dts: qcom: add initial device-tree for Microsoft Surface Duo

Microsoft Surface Duo is based on SM8150 chipset. This new Device Tree
is a copy of sm8150-mtp with a the addition of the volume up key and
relevant i2c nodes.
Signed-off-by: Felipe Balbi <felipe.balbi@microsoft.com>
Link: https://lore.kernel.org/r/20210603122923.1919624-1-balbi@kernel.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/Makefile

@@ -74,6 +74,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-oneplus-fajita.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm845-xiaomi-beryllium.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sdm850-lenovo-yoga-c630.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8150-hdk.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= sm8150-microsoft-surface-duo.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8150-mtp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8250-hdk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8250-mtp.dtb