docs: lcd-panel-cgram.txt: convert docs to ReST and rename to *.rst

This small text file describes the usage of parallel port LCD
displays from userspace PoV. So, a good candidate for the
admin guide.

While this is not part of the admin-guide book, mark it as
:orphan:, in order to avoid build warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Documentation/auxdisplay/lcd-panel-cgram.txt → Documentation/auxdisplay/lcd-panel-cgram.rst

+:orphan:
+
+======================================
+Parallel port LCD/Keypad Panel support
+======================================
+
 Some LCDs allow you to define up to 8 characters, mapped to ASCII
 characters 0 to 7. The escape code to define a new character is
 '\e[LG' followed by one digit from 0 to 7, representing the character
@@ -7,7 +13,7 @@ illuminated pixel with LSB on the right. Lines are numbered from the
 top of the character to the bottom. On a 5x7 matrix, only the 5 lower
 bits of the 7 first bytes are used for each character. If the string
 is incomplete, only complete lines will be redefined. Here are some
-examples :
+examples::
 
   printf "\e[LG0010101050D1F0C04;"  => 0 = [enter]
   printf "\e[LG1040E1F0000000000;"  => 1 = [up]
@@ -21,4 +27,3 @@ examples :
   printf "\e[LG00002061E1E060200;"  => small speaker
 
 Willy
-

MAINTAINERS

@@ -12058,7 +12058,7 @@ PARALLEL LCD/KEYPAD PANEL DRIVER
 M:	Willy Tarreau <willy@haproxy.com>
 M:	Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
 S:	Odd Fixes
-F:	Documentation/auxdisplay/lcd-panel-cgram.txt
+F:	Documentation/auxdisplay/lcd-panel-cgram.rst
 F:	drivers/auxdisplay/panel.c
 
 PARALLEL PORT SUBSYSTEM