CONFIG_ARCH_PXA is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
PXA2xx/PXA3xx-based
configname: CONFIG_ARCH_PXA
ARM system type
└─>PXA2xx/PXA3xx-based
In linux kernel since version 2.6.12
Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
is selected by
CONFIG_ARCH_LUBBOCKCONFIG_MACH_MAINSTONE
CONFIG_MACH_ZYLONITE
CONFIG_TOSA_BT
CONFIG_CPU_PXA300
CONFIG_CPU_PXA310
CONFIG_CPU_PXA320
CONFIG_CPU_PXA930
CONFIG_CPU_PXA935
CONFIG_SHARPSL_PM
CONFIG_MACH_TAVOREVB
CONFIG_FB_PXA
CONFIG_FB_MBX
CONFIG_FB_W100
CONFIG_SND_PXA2XX_AC97
CONFIG_USB_EHCI_MV