fit: Add standalone image type handling

Just add IH_TYPE_STANDALONE to fit_get_image_type_property().

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

common/image-fit.c

@@ -1725,6 +1725,8 @@ static const char *fit_get_image_type_property(int type)
 		return FIT_LOADABLE_PROP;
 	case IH_TYPE_FPGA:
 		return FIT_FPGA_PROP;
+	case IH_TYPE_STANDALONE:
+		return FIT_STANDALONE_PROP;
 	}
 
 	return "unknown";

include/image.h

@@ -922,6 +922,7 @@ int booti_setup(ulong image, ulong *relocated_addr, ulong *size);
 #define FIT_SETUP_PROP		"setup"
 #define FIT_FPGA_PROP		"fpga"
 #define FIT_FIRMWARE_PROP	"firmware"
+#define FIT_STANDALONE_PROP	"standalone"
 
 #define FIT_MAX_HASH_LEN	HASH_MAX_DIGEST_SIZE