net: phy: marvell: constify marvell_hw_stats

The list of stat registers is read-only, so we can declare it as const.
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/24d7a2f39e0c4c94466e8ad43228fdd798053f3a.1714643285.git.matthias.schiffer@ew.tq-group.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/marvell.c

@@ -313,7 +313,7 @@ struct marvell_hw_stat {
 	u8 bits;
 };
 
-static struct marvell_hw_stat marvell_hw_stats[] = {
+static const struct marvell_hw_stat marvell_hw_stats[] = {
 	{ "phy_receive_errors_copper", 0, 21, 16},
 	{ "phy_idle_errors", 0, 10, 8 },
 	{ "phy_receive_errors_fiber", 1, 21, 16},