OMAP: DSS2: Remove "EXPERIMENTAL" from Kconfig

DSS driver has not been "experimental" for many years now, so perhaps
it's time to remove the text from Kconfig titles.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/dss/Kconfig

 menuconfig OMAP2_DSS
-        tristate "OMAP2+ Display Subsystem support (EXPERIMENTAL)"
+        tristate "OMAP2+ Display Subsystem support"
         depends on ARCH_OMAP2PLUS
         help
 	  OMAP2+ Display Subsystem support.

drivers/video/omap2/omapfb/Kconfig

 menuconfig FB_OMAP2
-        tristate "OMAP2+ frame buffer support (EXPERIMENTAL)"
+        tristate "OMAP2+ frame buffer support"
         depends on FB && OMAP2_DSS
 
 	select OMAP2_VRAM