part_efi: Fix partition size calculation due to inclusive ending LBA.

The ending LBA is inclusive. Hence, the partition size should be
((ending-LBA + 1) - starting-LBA) to get the proper partition size.

This is confirmed against the results from the parted tool.
(e.g. use parted /dev/sda -s unit S print) and observe the size.

Signed-off-by: Richard Retanubun <RichardRetanubun@RuggedCom.com>

disk/part_efi.c

@@ -163,7 +163,9 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
 
 	/* The ulong casting limits the maximum disk size to 2 TB */
 	info->start = (ulong) le64_to_int((*pgpt_pte)[part - 1].starting_lba);
-	info->size = (ulong) le64_to_int((*pgpt_pte)[part - 1].ending_lba) - info->start;
+	/* The ending LBA is inclusive, to calculate size, add 1 to it */
+	info->size = ((ulong)le64_to_int((*pgpt_pte)[part - 1].ending_lba) + 1)
+		     - info->start;
 	info->blksz = GPT_BLOCK_SIZE;
 
 	sprintf((char *)info->name, "%s%d\n", GPT_ENTRY_NAME, part);