update a20 OLinuXino MICRO fex based on Olimex Debian image
a10s-olinuxino-m fex file improvements

-Default to HMDI out as only a few people will have the optional lcd
 module (and even then there are 3 different types requiring different configs)
-Don't use gpio's on axp, as the sunxi kernels don't support that with
 the axp152
-Add a leds section for the status led

Signed-off-by: Hans de Goede <hdegoede@redhat.com>