efi_loader: do not miss last relocation block

If the last block in the relocation table contains only a single
relocation, the current coding ignores it.

Fix the determination of the end of the relocation table.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

lib/efi_loader/efi_image_loader.c

@@ -111,7 +111,7 @@ static efi_status_t efi_loader_relocate(const IMAGE_BASE_RELOCATION *rel,
 		return EFI_SUCCESS;
 
 	end = (const IMAGE_BASE_RELOCATION *)((const char *)rel + rel_size);
-	while (rel < end - 1 && rel->SizeOfBlock) {
+	while (rel < end && rel->SizeOfBlock) {
 		const uint16_t *relocs = (const uint16_t *)(rel + 1);
 		i = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(uint16_t);
 		while (i--) {