Fix insecure permissions in a bunch of sysfs files

Conflicts:
	drivers/video/omap2/displays/panel-novatek.c
	drivers/video/omap2/displays/panel-orise.c
	drivers/video/omap2/dss/display.c
	drivers/video/omap2/dss/hdmi.c
	drivers/video/omap2/dss/hdmi_panel.c