CONFIG_AMIGA_PCMCIA is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

Amiga 1200/600 PCMCIA support (EXPERIMENTAL)

modulename: pcmcia.ko

configname: CONFIG_AMIGA_PCMCIA

Linux Kernel Configuration
└─>General setup
└─>Amiga 1200/600 PCMCIA support (EXPERIMENTAL)
In linux kernel since version 2.6.12  
Include support in the kernel for pcmcia on Amiga 1200 and Amiga
600. If you intend to use pcmcia cards say Y; otherwise say N.

source code:
arch/m68k/amiga/pcmcia.c
depends
CONFIG_AMIGA
CONFIG_EXPERIMENTAL or CONFIG_MMU

is selected by
CONFIG_APNE