am335x_evm: Make NAND support modular

Give the user the ability to disable NAND support by defining
CONFIG_NO_NAND. This will allow custom hardware to easily support
this configuration.

Signed-off-by: Justin Waters <justin.waters@timesys.com>
[trini: Make apply on top of other series]
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/boards.cfg b/boards.cfg
index ffb8a27..e49d6dd 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -242,7 +242,7 @@
 vexpress_ca5x2               arm         armv7       vexpress            armltd
 vexpress_ca9x4               arm         armv7       vexpress            armltd
 am335x_evm                   arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1,NAND
-am335x_evm_nor               arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1,NOR
+am335x_evm_nor               arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1,NAND,NOR
 am335x_evm_norboot           arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1,NOR,NOR_BOOT
 am335x_evm_spiboot           arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1,SPI_BOOT
 am335x_evm_uart1             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL2,CONS_INDEX=1,NAND