Modifications for v10 backend to get it working on omap4 based platforms

The omap4 hwcomposer relies on the framebuffer being opened before the hwcomposer (see http://phablet.ubuntu.com/gitweb?p=aosp/platform/hardware/ti/omap4xxx.git;a=blob;f=hwc/hwc.c;h=baae1c14e464894d3ef23a7257251e144dd8b3dd;hb=HEAD#l1977) therefor we need to care that the fbdev EGL platform is initialized when we load the hwcomposer.