Merge pull request #8298 from uploadcare/missing-CMYK;16B

Add missing TIFF CMYK;16B reader

Author: homm

src/PIL/TiffImagePlugin.py

@@ -259,6 +259,7 @@
     (II, 5, (1,), 1, (8, 8, 8, 8, 8, 8), (0, 0)): ("CMYK", "CMYKXX"),
     (MM, 5, (1,), 1, (8, 8, 8, 8, 8, 8), (0, 0)): ("CMYK", "CMYKXX"),
     (II, 5, (1,), 1, (16, 16, 16, 16), ()): ("CMYK", "CMYK;16L"),
+    (MM, 5, (1,), 1, (16, 16, 16, 16), ()): ("CMYK", "CMYK;16B"),
     (II, 6, (1,), 1, (8,), ()): ("L", "L"),
     (MM, 6, (1,), 1, (8,), ()): ("L", "L"),
     # JPEG compressed images handled by LibTiff and auto-converted to RGBX