Return ENOTTY instead of EINVAL for unknown ioctl ops in matroxfb.

drivers/video/matrox/matroxfb_base.c

@@ -1168,7 +1168,7 @@ static int matroxfb_ioctl(struct inode *inode, struct file *file,
 				return 0;
 			}
 	}
-	return -EINVAL;
+	return -ENOTTY;
 #undef minfo
 }
 

drivers/video/matrox/matroxfb_crtc2.c

@@ -679,7 +679,7 @@ static int matroxfb_dh_ioctl(struct inode* inode,
 				return 0;
 			}
 	}
-	return -EINVAL;
+	return -ENOTTY;
 #undef m2info
 }