This will enable TI wl1251 driver support. The drivers make use of the mac80211 stack. If you choose to build a module, it'll be called wl1251. Say N if unsure.
This module adds support for the SPI interface of adapters using TI wl1251 chipset. Select this if your platform is using the SPI bus. If you choose to build a module, it'll be called wl1251_spi. Say N if unsure.
This module adds support for the SDIO interface of adapters using TI wl1251 chipset. Select this if your platform is using the SDIO bus. If you choose to build a module, it'll be called wl1251_sdio. Say N if unsure.