media-video/mpv: adjust opengl dependency in 9999

We no longer need virtual/opengl for anything, but X.

Gentoo-bug: 614990
Upstream-commit: eb83ee4a4a03269ac6de296c9a1c01f68bb2e835
Package-Manager: Portage-2.3.5, Repoman-2.3.2

media-video/mpv/mpv-9999.ebuild

@@ -87,12 +87,8 @@ COMMON_DEPEND="
 		luajit? ( dev-lang/luajit:2 )
 	)
 	openal? ( >=media-libs/openal-1.13 )
-	opengl? ( X? ( virtual/opengl ) )
 	pulseaudio? ( media-sound/pulseaudio )
-	raspberry-pi? (
-		>=media-libs/raspberrypi-userland-0_pre20160305-r1
-		virtual/opengl
-	)
+	raspberry-pi? ( >=media-libs/raspberrypi-userland-0_pre20160305-r1 )
 	rubberband? ( >=media-libs/rubberband-1.8.0 )
 	samba? ( net-fs/samba[smbclient(+)] )
 	sdl? ( media-libs/libsdl2[sound,threads,video] )
@@ -109,7 +105,10 @@ COMMON_DEPEND="
 		x11-libs/libXext
 		x11-libs/libXinerama
 		x11-libs/libXrandr
-		opengl? ( x11-libs/libXdamage )
+		opengl? (
+			x11-libs/libXdamage
+			virtual/opengl
+		)
 		xv? ( x11-libs/libXv )
 	)
 "