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/sbc8641d_defconfig b/configs/sbc8641d_defconfig
index 24305da..97b4c4f 100644
--- a/configs/sbc8641d_defconfig
+++ b/configs/sbc8641d_defconfig
@@ -10,5 +10,6 @@
 CONFIG_CMD_I2C=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_PING=y
+CONFIG_DOS_PARTITION=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y