ARM: rmobile: Enable HUSH on M2 Porter

Enable the HUSH shell, since it is far more capable.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/configs/porter_defconfig b/configs/porter_defconfig
index e4a2828..7c58b13 100644
--- a/configs/porter_defconfig
+++ b/configs/porter_defconfig
@@ -37,6 +37,7 @@
 CONFIG_TPL_SPI_LOAD=y
 CONFIG_TPL_SPI_SUPPORT=y
 CONFIG_TPL_YMODEM_SUPPORT=y
+CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_XIMG is not set