docs-rst: nv12mt zigzag images: replace by SVG images

Instead of using bitmap images to show the zigzag macroblock
parsing, replace it by a SVG ones, with is scalable.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/media/Makefile

@@ -17,6 +17,8 @@ IMAGES = \
 	uapi/v4l/crop.svg \
 	uapi/v4l/fieldseq_bt.svg \
 	uapi/v4l/fieldseq_tb.svg \
+	uapi/v4l/nv12mt.svg \
+	uapi/v4l/nv12mt_example.svg \
 	uapi/v4l/subdev-image-processing-full.svg \
 	uapi/v4l/subdev-image-processing-scaling-multi-source.svg \
 	uapi/v4l/subdev-image-processing-crop.svg \

Documentation/media/uapi/v4l/pixfmt-nv12mt.rst

@@ -33,8 +33,8 @@ Layout of macroblocks in memory is presented in the following figure.
 
 .. _nv12mt:
 
-.. figure::  nv12mt.png
-    :alt:    nv12mt.png
+.. figure::  nv12mt.*
+    :alt:    nv12mt.pdf / nv12mt.svg
     :align:  center
 
     V4L2_PIX_FMT_NV12MT macroblock Z shape memory layout
@@ -50,8 +50,8 @@ interleaved. Height of the buffer is aligned to 32.
 
 .. _nv12mt_ex:
 
-.. figure::  nv12mt_example.png
-    :alt:    nv12mt_example.png
+.. figure::  nv12mt_example.*
+    :alt:    nv12mt_example.pdf / nv12mt_example.svg
     :align:  center
 
     Example V4L2_PIX_FMT_NV12MT memory layout of macroblocks