tridentfb: remove misplaced enable_mmio()

Remove redundant enable_mmio() call as the mmio mode is enabled in the probe
function earlier.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c
index bd54cd0..982eeee 100644
--- a/drivers/video/tridentfb.c
+++ b/drivers/video/tridentfb.c
@@ -905,7 +905,6 @@
 	vblankstart = var->yres;
 	vblankend = vtotal + 2;
 
-	enable_mmio();
 	crtc_unlock();
 	write3CE(CyberControl, 8);