disk: convert CONFIG_ISO_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/jupiter_defconfig b/configs/jupiter_defconfig
index c058bac..525a06e 100644
--- a/configs/jupiter_defconfig
+++ b/configs/jupiter_defconfig
@@ -9,4 +9,5 @@
 CONFIG_CMD_SNTP=y
 CONFIG_MAC_PARTITION=y
 CONFIG_DOS_PARTITION=y
+CONFIG_ISO_PARTITION=y
 # CONFIG_PCI is not set