imx-bootlets: Drop imx233-olinuxino support

We've been using imx233-olinuxino with U-Boot for quite some time and
this reduces the amount of code we need to maintain, so remove it.

Change-Id: I872fada913e7dfb95cddcdf3fc336964f3468e63
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
init-ifupdown: migrate interfaces from netbase

since Mon Feb 4 19:13:20 2013 +0200, commit
"5ce5c3d netbase: split up in netbase and init-ifupdown" in oe-core
moved netbase's configuration file into init-ifupdown

Change-Id: Iefdf697cdb080adc4cfd9a157406a3c5fa25b7bb
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>