Documentation: fb: ep93xx: Demote section headings

Section headings are formatted the same as title heading, thus
increasing number of entries in framebuffer toctree. Demote them.

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>

Author: bagasme

Documentation/fb/ep93xx-fb.rst

@@ -41,7 +41,6 @@ your board initialisation function::
 
 	ep93xx_register_fb(&some_board_fb_info);
 
-=====================
 Video Attribute Flags
 =====================
 
@@ -79,7 +78,6 @@ EP93XXFB_USE_SDCSN2		Use SDCSn[2] for the framebuffer.
 EP93XXFB_USE_SDCSN3		Use SDCSn[3] for the framebuffer.
 =============================== ======================================
 
-==================
 Platform callbacks
 ==================
 
@@ -101,7 +99,6 @@ obtained as follows::
 		/* Board specific framebuffer setup */
 	}
 
-======================
 Setting the video mode
 ======================
 
@@ -119,7 +116,6 @@ set when the module is installed::
 
 	modprobe ep93xx-fb video=320x240
 
-==============
 Screenpage bug
 ==============