disk: convert CONFIG_MAC_PARTITION to Kconfig

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
diff --git a/configs/v38b_defconfig b/configs/v38b_defconfig
index 7fde07f..efa2672 100644
--- a/configs/v38b_defconfig
+++ b/configs/v38b_defconfig
@@ -11,6 +11,7 @@
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_FAT=y
+CONFIG_MAC_PARTITION=y
 CONFIG_LED_STATUS=y
 CONFIG_LED_STATUS0=y
 CONFIG_LED_STATUS_BIT=16