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/pcm051_rev1_defconfig b/configs/pcm051_rev1_defconfig
index 10ddb2f..99026af 100644
--- a/configs/pcm051_rev1_defconfig
+++ b/configs/pcm051_rev1_defconfig
@@ -43,6 +43,7 @@
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_ISO_PARTITION=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_WINBOND=y