configs: phycore_am64x_a53_defconfig: Enable GPIO command

Enable the GPIO command to allow access to the GPIO pins.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
diff --git a/configs/phycore_am64x_a53_defconfig b/configs/phycore_am64x_a53_defconfig
index 4b9dcce..4a91b72 100644
--- a/configs/phycore_am64x_a53_defconfig
+++ b/configs/phycore_am64x_a53_defconfig
@@ -72,6 +72,7 @@
 CONFIG_CMD_ASKENV=y
 CONFIG_CMD_NVEDIT_EFI=y
 CONFIG_CMD_DFU=y
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y