bcm968380gerg: add nand support

Enable the nand support (driver and command)
in the configuration of the board bcm96838gerg.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/configs/bcm968380gerg_ram_defconfig b/configs/bcm968380gerg_ram_defconfig
index fa9dc85..53423e5 100644
--- a/configs/bcm968380gerg_ram_defconfig
+++ b/configs/bcm968380gerg_ram_defconfig
@@ -26,6 +26,7 @@
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
 # CONFIG_CMD_LOADS is not set
+CONFIG_CMD_NAND=y
 # CONFIG_CMD_MISC is not set
 CONFIG_DEFAULT_DEVICE_TREE="brcm,bcm968380gerg"
 # CONFIG_NET is not set
@@ -36,6 +37,12 @@
 CONFIG_LED=y
 CONFIG_LED_BCM6328=y
 CONFIG_LED_BLINK=y
+CONFIG_MTD=y
+CONFIG_NAND=y
+CONFIG_NAND_BRCMNAND=y
+CONFIG_NAND_BRCMNAND_6838=y
+CONFIG_SPI_FLASH=y
+# CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_PHY=y
 CONFIG_BCM6368_USBH_PHY=y
 CONFIG_PINCTRL=y