disk: convert CONFIG_EFI_PARTITION to Kconfig

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index 6c8dca2..6cc113d 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -112,7 +112,7 @@
 		return;
 	}
 
-#ifdef CONFIG_EFI_PARTITION
+#if CONFIG_IS_ENABLED(EFI_PARTITION)
 	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
 		printf("%s: updating MBR, Primary and Backup GPT(s)\n",
 		       __func__);