cmd: Move CONFIG_RANDOM_UUID to Kconfig

CONFIG_RANDOM_UUID is used by the GPT command to generate random UUID when
none are provided.

Move that option to Kconfig.

Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/configs/evb-rv1108_defconfig b/configs/evb-rv1108_defconfig
index 2dcb85d..f035066 100644
--- a/configs/evb-rv1108_defconfig
+++ b/configs/evb-rv1108_defconfig
@@ -13,6 +13,7 @@
 CONFIG_FASTBOOT_FLASH=y
 CONFIG_FASTBOOT_FLASH_MMC_DEV=1
 # CONFIG_CMD_IMLS is not set
+CONFIG_RANDOM_UUID=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set