CONFIG_MACH_EZX_A780 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_EZX_A780.
Result is shown for kernelversion 6.9.9

Motorola EZX A780

configname: CONFIG_MACH_EZX_A780

Linux Kernel Configuration
└─>PXA2xx/PXA3xx-based
└─>Intel PXA2xx/PXA3xx Implementations
└─>Motorola EZX A780
In linux kernel since version 2.6.27 (release Date: 2008-10-09)