stm32mp: stm32prog: Add support of ESP partition type

Add support of "ESP" partition type in flashlayout to select
the "EFI System Partition", associated to U-Boot "system"
partition type  guid, PARTITION_SYSTEM_GUID =
C12A7328-F81F-11d2-BA4B-00A0C93EC93B.

This partition is the bootable partition for efi boot.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h
index 7493008..a196270 100644
--- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h
+++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h
@@ -96,13 +96,19 @@
 	u8 extension_padding[376];
 };
 
-/* partition type in flashlayout file */
+/*
+ * partition type in flashlayout file
+ * SYSTEM = linux partition, bootable
+ * FILESYSTEM = linux partition
+ * ESP = EFI system partition
+ */
 enum stm32prog_part_type {
 	PART_BINARY,
 	PART_FIP,
 	PART_ENV,
 	PART_SYSTEM,
 	PART_FILESYSTEM,
+	PART_ESP,
 	RAW_IMAGE,
 };