rb3gen2-core-kit: add phone to MACHINE_FEATURES

Add 'phone' to MACHINE_FEATURES to support cellular and
telephony functionality for external M.2 attach modems
on RB3Gen2 Industrial kit configurations.

On RB3 Gen2, the SDX modem is attached via the Industrial
Mezzanine Board, which provides an M.2 B-key slot (PCIe/MHI).
The base RB3 Gen2 core/vision kits do not include native M.2
support.

Signed-off-by: Mrigank Dembla <mdembla@qti.qualcomm.com>

Author: mdembla-bit

conf/machine/rb3gen2-core-kit.conf

@@ -5,7 +5,7 @@
 require conf/machine/include/qcom-qcs6490.inc
 
 # NOTE: TPM hardware is only present on rb3gen2-industrial kit
-MACHINE_FEATURES += "efi pci tpm2"
+MACHINE_FEATURES += "efi pci tpm2 phone"
 
 KERNEL_DEVICETREE ?= " \
                       qcom/qcs6490-rb3gen2.dtb \