configs: am65x_evm_r5: Enable GPT support

The second loader stages may be stored on GPT partitions,
enable support for this here.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/configs/am65x_evm_r5_defconfig b/configs/am65x_evm_r5_defconfig
index d2ec2dd..49498b1 100644
--- a/configs/am65x_evm_r5_defconfig
+++ b/configs/am65x_evm_r5_defconfig
@@ -33,6 +33,7 @@
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_ASKENV=y
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_REMOTEPROC=y
 # CONFIG_CMD_SETEXPR is not set