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/d2net_v2_defconfig b/configs/d2net_v2_defconfig
index 87686aa..8435c39 100644
--- a/configs/d2net_v2_defconfig
+++ b/configs/d2net_v2_defconfig
@@ -20,6 +20,7 @@
 CONFIG_CMD_PING=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
+CONFIG_ISO_PARTITION=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SYS_NS16550=y