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/v38b_defconfig b/configs/v38b_defconfig
index efa2672..4710206 100644
--- a/configs/v38b_defconfig
+++ b/configs/v38b_defconfig
@@ -12,6 +12,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_FAT=y
 CONFIG_MAC_PARTITION=y
+CONFIG_DOS_PARTITION=y
 CONFIG_LED_STATUS=y
 CONFIG_LED_STATUS0=y
 CONFIG_LED_STATUS_BIT=16