rockchip: rk3328: enable USB mass storage on Renegade

This is very useful to access the LibreComputer eMMC as removable
storage from a PC (e.g. like so `ums 0 mmc 0`). It has been tested as
working on my Renegade board.

Signed-off-by: Leonidas P. Papadakos <papadakospan at gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/roc-cc-rk3328_defconfig b/configs/roc-cc-rk3328_defconfig
index cf04bbc..e3e40a6 100644
--- a/configs/roc-cc-rk3328_defconfig
+++ b/configs/roc-cc-rk3328_defconfig
@@ -36,6 +36,7 @@
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_TIME=y
 CONFIG_SPL_OF_CONTROL=y