phy: ti: am654: show up in regmap debugfs

The max_register property must be set in order to
show up the registers in debugfs.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Link: https://lore.kernel.org/r/20200513131254.10497-2-rogerq@ti.comSigned-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/ti/phy-am654-serdes.c

@@ -77,6 +77,7 @@ static struct regmap_config serdes_am654_regmap_config = {
 	.val_bits = 32,
 	.reg_stride = 4,
 	.fast_io = true,
+	.max_register = 0x1ffc,
 };
 
 static const struct reg_field cmu_master_cdn_o = REG_FIELD(CMU_R07C, 24, 24);