Disable paint optimization for neon only

** amended by bigrushdog **

Define SKPAINTOPTIONS_OPT for Neon devices only.
 Skip defining by default, instead handle globally in eos_config.mk

See http://review.teameos.org/#/c/205/

Change-Id: I8fee51018db020db96a2a8a613140c2f57c8287c
Signed-off-by: bart452 <bart4524@gmail.com>