doc-rst: pixfmt-nv16m: remove an empty column

The conversion added an empty column (probably, it was used on
DocBook just to increase spacing.

It also added an extra line on one of the texts, breaking
the original paragraph into two ones.

Remove them.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/linux_tv/media/v4l/pixfmt-nv16m.rst

@@ -34,7 +34,6 @@ used only in drivers and applications that support the multi-planar API,
 described in :ref:`planar-apis`.
 
 **Byte Order..**
-
 Each cell is one byte.
 
 
@@ -163,7 +162,6 @@ Each cell is one byte.
        -  
        -  1
 
-       -  
        -  2
 
        -  
@@ -178,7 +176,6 @@ Each cell is one byte.
        -  
        -  Y
 
-       -  
        -  Y
 
        -  
@@ -190,7 +187,6 @@ Each cell is one byte.
        -  
        -  C
 
-       -  
        -  
        -  
        -  C
@@ -206,7 +202,6 @@ Each cell is one byte.
        -  
        -  Y
 
-       -  
        -  Y
 
        -  
@@ -218,7 +213,6 @@ Each cell is one byte.
        -  
        -  C
 
-       -  
        -  
        -  
        -  C
@@ -238,7 +232,6 @@ Each cell is one byte.
        -  
        -  Y
 
-       -  
        -  Y
 
        -  
@@ -250,7 +243,6 @@ Each cell is one byte.
        -  
        -  C
 
-       -  
        -  
        -  
        -  C
@@ -266,7 +258,6 @@ Each cell is one byte.
        -  
        -  Y
 
-       -  
        -  Y
 
        -  
@@ -278,7 +269,6 @@ Each cell is one byte.
        -  
        -  C
 
-       -  
        -  
        -  
        -  C