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/inet98v_rev2_defconfig b/configs/inet98v_rev2_defconfig
index a63fa4f..ca03cd6 100644
--- a/configs/inet98v_rev2_defconfig
+++ b/configs/inet98v_rev2_defconfig
@@ -21,4 +21,5 @@
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
 # CONFIG_SPL_DOS_PARTITION is not set
+# CONFIG_SPL_ISO_PARTITION is not set
 CONFIG_USB_MUSB_HOST=y