pinctrl: actions: pinctrl-s900: Constify s900_padinfo[]

The only usage of s900_padinfo[] is to assign it to the padinfo field in
the owl_pinctrl_soc_data struct, which is a const pointer. Make it const
to allow the compiler to put it in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200830224311.36994-4-rikard.falkeborn@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/actions/pinctrl-s900.c

@@ -1556,7 +1556,7 @@ static PAD_ST_CONF(I2S_BCLK0, 1, 1, 1);
 static PAD_ST_CONF(I2S_MCLK0, 1, 0, 1);
 
 /* Pad info table */
-static struct owl_padinfo s900_padinfo[NUM_PADS] = {
+static const struct owl_padinfo s900_padinfo[NUM_PADS] = {
 	[ETH_TXD0] = PAD_INFO_ST(ETH_TXD0),
 	[ETH_TXD1] = PAD_INFO_ST(ETH_TXD1),
 	[ETH_TXEN] = PAD_INFO_ST(ETH_TXEN),