bus_vcxk.c: fix warning: unused variable 'lineptr'

Signed-off-by: Jens Scharsig <esw@bus-elektronik.de>
diff --git a/drivers/video/bus_vcxk.c b/drivers/video/bus_vcxk.c
index b3b53e1..7726bb3 100644
--- a/drivers/video/bus_vcxk.c
+++ b/drivers/video/bus_vcxk.c
@@ -380,7 +380,6 @@
 	unsigned long c_width;
 	unsigned long c_height;
 	unsigned char *dataptr;
-	unsigned char *lineptr;
 
 	bmp = (bmp_image_t *) addr;
 	if ((bmp->header.signature[0] == 'B') &&