staging: vt6655: Replace MACvWriteISR with VNSvOutPortD

Replace macro MACvWriteISR with VNSvOutPortD and as it
was the only user, it can now be removed.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/80cd68a83807209230a898ab0260188adfad4158.1653203927.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/device_main.c

@@ -1055,7 +1055,7 @@ static void vnt_interrupt_process(struct vnt_private *priv)
 	 * update ISR counter
 	 */
 	while (isr && priv->vif) {
-		MACvWriteISR(priv->port_offset, isr);
+		VNSvOutPortD(priv->port_offset + MAC_REG_ISR, isr);
 
 		if (isr & ISR_FETALERR) {
 			pr_debug(" ISR_FETALERR\n");

drivers/staging/vt6655/mac.h

@@ -648,9 +648,6 @@ do {									\
 	iowrite8(byOrgValue, iobase + MAC_REG_STICKHW);			\
 } while (0)
 
-#define MACvWriteISR(iobase, dwValue)				\
-	VNSvOutPortD(iobase + MAC_REG_ISR, dwValue)
-
 #define MACvIntEnable(iobase, dwMask)				\
 	VNSvOutPortD(iobase + MAC_REG_IMR, dwMask)