viafb: choose acceleration engine for VX855

Enable 2D hardware acceleration on VX855 for copyarea, imageblit and
fillrect by selecting the correct engine which is the same as in VX800.

Signed-off-by: Florian Tobias Schandinat <[email protected]>
Cc: Scott Fang <[email protected]>
Cc: Joseph Chan <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

drivers/video/via/accel.c

@@ -337,6 +337,7 @@ int viafb_init_engine(struct fb_info *info)
 		viapar->shared->hw_bitblt = hw_bitblt_1;
 		break;
 	case UNICHROME_VX800:
+	case UNICHROME_VX855:
 		viapar->shared->hw_bitblt = hw_bitblt_2;
 		break;
 	default: