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/cmd/zfs.c b/cmd/zfs.c
index 8f0c410..3ed9912 100644
--- a/cmd/zfs.c
+++ b/cmd/zfs.c
@@ -24,7 +24,7 @@
 #include <usb.h>
 #endif
 
-#if !CONFIG_IS_ENABLED(DOS_PARTITION) && !defined(CONFIG_EFI_PARTITION)
+#if !CONFIG_IS_ENABLED(DOS_PARTITION) && !CONFIG_IS_ENABLED(EFI_PARTITION)
 #error DOS or EFI partition support must be selected
 #endif