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/cam5200_defconfig b/configs/cam5200_defconfig
index c6d9e37..0f7f361 100644
--- a/configs/cam5200_defconfig
+++ b/configs/cam5200_defconfig
@@ -15,5 +15,6 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_SNTP=y
 CONFIG_MAC_PARTITION=y
+CONFIG_DOS_PARTITION=y
 # CONFIG_PCI is not set
 CONFIG_OF_LIBFDT=y