stm32mp: stm32prog: add upport of partial update

Add support of partial update, update only some partitions,
and check the coherence of the layout with the existing GPT
partitions (offset and size).

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h

@@ -69,6 +69,7 @@ struct stm32prog_dev_t {
 	struct mmc		*mmc;
 	/* list of partition for this device / ordered in offset */
 	struct list_head	part_list;
+	bool			full_update;
 };
 
 /* partition information build from FlashLayout and device */