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/whistler_defconfig b/configs/whistler_defconfig
index b7c3ed9..aa10db9 100644
--- a/configs/whistler_defconfig
+++ b/configs/whistler_defconfig
@@ -18,6 +18,7 @@
 # CONFIG_CMD_SETEXPR is not set
 # CONFIG_CMD_NFS is not set
 CONFIG_CMD_EXT4_WRITE=y
+# CONFIG_SPL_DOS_PARTITION is not set
 CONFIG_SPL_DM=y
 # CONFIG_BLK is not set
 # CONFIG_DM_MMC_OPS is not set