CONFIG_MACH_WG302V2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Netgear WG302 v2 / WAG302 v2

modulename: wg302v2-setup.ko

configname: CONFIG_MACH_WG302V2

Linux Kernel Configuration
└─>Intel IXP4xx Implementation Options
└─>Netgear WG302 v2 / WAG302 v2
In linux kernel since version 2.6.23 (release Date: 2007-10-09)  
Say 'Y' here if you want your kernel to support Netgear's
WG302 v2 or WAG302 v2 Access Points. For more information
on this platform, see http://openwrt.org

source code:
selects
CONFIG_PCI