board: gateworks: venice: add GPIO name lookup

Add GPIO name lookup so that you can act on GPIO's by name vs controller
id:

Before:
u-boot=> gpio input pci_wdis#
GPIO: 'pci_wdis#' not found
Command 'gpio' failed: Error -22

After:
u-boot=> gpio input pci_wdis#
gpio: pin pci_wdis# (gpio 103) value is 1

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/configs/imx8mm_venice_defconfig b/configs/imx8mm_venice_defconfig
index 9d0d0ee..2e72992 100644
--- a/configs/imx8mm_venice_defconfig
+++ b/configs/imx8mm_venice_defconfig
@@ -89,6 +89,7 @@
 CONFIG_SPL_CLK_IMX8MM=y
 CONFIG_CLK_IMX8MM=y
 CONFIG_GPIO_HOG=y
+CONFIG_DM_GPIO_LOOKUP_LABEL=y
 CONFIG_MXC_GPIO=y
 CONFIG_DM_I2C=y
 CONFIG_LED=y