clk: meson: s4: pll: determine maximum register in regmap config

When the max_register value is not set, the regmap debugfs 'registers'
file does not display the entire range of the regmap.

Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Link: https://lore.kernel.org/r/20240320155512.3544-5-ddrokosov@salutedevices.com
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

drivers/clk/meson/s4-pll.c

@@ -798,6 +798,7 @@ static struct regmap_config clkc_regmap_config = {
 	.reg_bits       = 32,
 	.val_bits       = 32,
 	.reg_stride     = 4,
+	.max_register   = ANACTRL_HDMIPLL_CTRL0,
 };
 
 static struct meson_clk_hw_data s4_pll_clks = {