CONFIG_ARCH_LPC32XX_UART4_SELECT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_LPC32XX_UART4_SELECT.
Result is shown for kernelversion 6.2.5

Add support for standard UART4


Linux Kernel Configuration
└─>Individual UART enable selections
└─>Add support for standard UART4
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
Adds support for standard UART 4 when the 8250 serial support
is enabled.