CONFIG_ARCH_MSM7X00A is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Qualcomm MSM7X00A

configname: CONFIG_ARCH_MSM7X00A

ARM system type
└─>Qualcomm MSM7X00A
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
Support for Qualcomm MSM7X00A based systems. This runs on the ARM11
apps processor of the MSM7X00A and depends on a shared memory
interface to the ARM9 modem processor which runs the baseband stack
and controls some vital subsystems (clock and power control, etc).
<http://www.cdmatech.com/products/msm7200_chipset_solution.jsp>