bcm963158: add nand support

Enable the nand support (driver and command)
in the configuration of the board bcm963158.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/configs/bcm963158_ram_defconfig b/configs/bcm963158_ram_defconfig
index 5659249..e97241c 100644
--- a/configs/bcm963158_ram_defconfig
+++ b/configs/bcm963158_ram_defconfig
@@ -21,6 +21,8 @@
 # CONFIG_CMD_UNZIP is not set
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
+CONFIG_CMD_MTD=y
+CONFIG_CMD_NAND=y
 CONFIG_CMD_CACHE=y
 CONFIG_DOS_PARTITION=y
 CONFIG_ISO_PARTITION=y
@@ -32,6 +34,10 @@
 CONFIG_DM_GPIO=y
 CONFIG_BCM6345_GPIO=y
 # CONFIG_MMC is not set
+CONFIG_MTD=y
+CONFIG_NAND=y
+CONFIG_NAND_BRCMNAND=y
+CONFIG_NAND_BRCMNAND_63158=y
 CONFIG_SPECIFY_CONSOLE_INDEX=y
 # CONFIG_SPL_SERIAL_PRESENT is not set
 CONFIG_CONS_INDEX=0