cmd, disk: convert CONFIG_PARTITION_UUIDS, CMD_PART and CMD_GPT

We convert CONFIG_PARTITION_UUIDS to Kconfig first.  But in order to cleanly
update all of the config files we must also update CMD_PART and CMD_GPT to also
be in Kconfig in order to avoid complex logic elsewhere to update all of the
config files.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index ce70951..877aa94 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -27,6 +27,7 @@
 CONFIG_CMD_MX_CYCLIC=y
 CONFIG_CMD_MEMINFO=y
 CONFIG_CMD_DEMO=y
+CONFIG_CMD_GPT=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_I2C=y