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/edb9315a_defconfig b/configs/edb9315a_defconfig
index 7c89460f..b26f947 100644
--- a/configs/edb9315a_defconfig
+++ b/configs/edb9315a_defconfig
@@ -28,5 +28,6 @@
 CONFIG_LED_STATUS_RED=1
 CONFIG_LED_STATUS_GREEN_ENABLE=y
 CONFIG_LED_STATUS_GREEN=0
+# CONFIG_DOS_PARTITION is not set
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y