net: dsa: microchip: simplify ksz_prmw8()

Implement ksz_prmw8() in terms of ksz_rmw8(), just as all the other
ksz_pX are implemented in terms of ksz_X. No functional change.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Link: https://lore.kernel.org/r/20230620113855.733526-2-linux@rasmusvillemoes.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Villemoes

drivers/net/dsa/microchip/ksz_common.h

@@ -578,17 +578,8 @@ static inline int ksz_pwrite32(struct ksz_device *dev, int port, int offset,
 static inline int ksz_prmw8(struct ksz_device *dev, int port, int offset,
 			    u8 mask, u8 val)
 {
-	int ret;
-
-	ret = regmap_update_bits(ksz_regmap_8(dev),
-				 dev->dev_ops->get_port_addr(port, offset),
-				 mask, val);
-	if (ret)
-		dev_err(dev->dev, "can't rmw 8bit reg 0x%x: %pe\n",
-			dev->dev_ops->get_port_addr(port, offset),
-			ERR_PTR(ret));
-
-	return ret;
+	return ksz_rmw8(dev, dev->dev_ops->get_port_addr(port, offset),
+			mask, val);
 }
 
 static inline void ksz_regmap_lock(void *__mtx)