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

Compressed ROM boot loader base address


Linux Kernel Configuration
└─>Boot options
└─>Compressed ROM boot loader base address
In linux kernel since version 2.6.12  
The physical address at which the ROM-able zImage is to be
placed in the target. Platforms which normally make use of
ROM-able zImage formats normally set this to a suitable
value in their defconfig file.

If ZBOOT_ROM is not enabled, this has no effect.