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.
selects
CONFIG_ARCH_MTD_XIPCONFIG_ARCH_HAS_CPUFREQ
CONFIG_CLKDEV_LOOKUP
CONFIG_CLKSRC_MMIO
CONFIG_ARCH_REQUIRE_GPIOLIB
CONFIG_GENERIC_CLOCKEVENTS
CONFIG_HAVE_SCHED_CLOCK
CONFIG_TICK_ONESHOT
CONFIG_PLAT_PXA
CONFIG_SPARSE_IRQ