ramips: fix Olimex models, images and profiles names

Official names for RT5350F based OLinuXino products are "RT5350F-OLinuXino{,-EVB}" as on official manufacturer website.
The following patch:
 * changes board names from "olinuxino-rt5350f{,-evb}" to "rt5350f-olinuxino{,-evb}"
 * changes filenames of dts and profile files
 * changes image filenames

for Olimex RT5350F-OLinuXino{,-EVB} devices.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46623 3c298f89-4303-0410-b956-a3cf2f4a3e73