disk: convert CONFIG_DOS_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/ap325rxa_defconfig b/configs/ap325rxa_defconfig
index 818eb41..8256eca 100644
--- a/configs/ap325rxa_defconfig
+++ b/configs/ap325rxa_defconfig
@@ -19,4 +19,5 @@
 CONFIG_CMD_PING=y
 # CONFIG_CMD_MISC is not set
 CONFIG_CMD_EXT2=y
+CONFIG_DOS_PARTITION=y
 CONFIG_USE_PRIVATE_LIBGCC=y