fbdev: fix modedb docs in fb_find_mode

Fix up the indenting that confused sphinx. To make sure we
don't have to make the examples unreadable with escaping just
put them in as block quotes, that seems the simplest solution.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[b.zolnierkie: ported over fbdev changes]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/core/modedb.c

@@ -642,9 +642,12 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
  * @default_mode fails, all modes in the video mode database will
  * be tried.
  *
- *     Valid mode specifiers for @mode_option:
+ * Valid mode specifiers for @mode_option::
+ *
+ *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
+ *
+ * or ::
  *
- *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m] or
  *     <name>[-<bpp>][@<refresh>]
  *
  * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
@@ -655,8 +658,8 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
  * Video Timings (CVT).  If 'R' is present after 'M', will compute with
  * reduced blanking (for flatpanels).  If 'i' or 'p' are present, compute
  * interlaced or progressive mode.  If 'm' is present, add margins equal
- *      to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The chars
- *      'i', 'p' and 'm' must be after 'M' and 'R'. Example:
+ * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
+ * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
  *
  *     1024x768MR-8@60m - Reduced blank with margins at 60Hz.
  *
@@ -666,7 +669,6 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
  * Returns zero for failure, 1 if using specified @mode_option,
  * 2 if using specified @mode_option with an ignored refresh rate,
  * 3 if default mode is used, 4 if fall back to any valid mode.
- *
  */
 
 int fb_find_mode(struct fb_var_screeninfo *var,