doc-rst: v4l/pixfmt: re-join a broken paragraph

Originally, at the DocBook, the "Byte Order" were a single
paragraph with the string that follows it. The conversion
broke it, and, sometimes, it added an extra dot.

Fix them altogheter at pixfmt-*.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/Documentation/linux_tv/media/v4l/pixfmt-nv12.rst b/Documentation/linux_tv/media/v4l/pixfmt-nv12.rst
index c15437c..906d1ef 100644
--- a/Documentation/linux_tv/media/v4l/pixfmt-nv12.rst
+++ b/Documentation/linux_tv/media/v4l/pixfmt-nv12.rst
@@ -31,8 +31,7 @@
 If the Y plane has pad bytes after each row, then the CbCr plane has as
 many pad bytes after its rows.
 
-**Byte Order..**
-
+**Byte Order.**
 Each cell is one byte.