auxdisplay: linedisp: Group display drivers together

For better usability group the display drivers together in Kconfig.
With this we will have the following sections:
  - Character LCD
  - Samsung KS0108 LCD controller
  - Single character line display
  - Character LCD with non-conforming interface

Keep Makefile entries sorted alphabetically.

While at it, drop redundant 'default n' entries.

Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>