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/rainier_ramboot_defconfig b/configs/rainier_ramboot_defconfig
index 64b4053..c422c5e 100644
--- a/configs/rainier_ramboot_defconfig
+++ b/configs/rainier_ramboot_defconfig
@@ -19,5 +19,6 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_FAT=y
+CONFIG_MAC_PARTITION=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y