Convert CONFIG_AT91SAM9G20EK et al to Kconfig

This converts the following to Kconfig:
   CONFIG_AT91SAM9G20EK
   CONFIG_AT91SAM9260EK
   CONFIG_AT91SAM9G20EK_2MMC

Cc: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
13 files changed