CONFIG_ARCH_MDM9615 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Enable support for MDM9615

configname: CONFIG_ARCH_MDM9615

Linux Kernel Configuration
└─>Qualcomm Support
└─>Enable support for MDM9615
In linux kernel since version 4.1 (release Date: 2015-06-21)