pinctrl: actions: pinctrl-s500: Constify s500_padinfo[]

s500_padinfo[] is never modified and should be made 'const' to allow
the compiler to optimize code generation, i.e. put it in the text
section instead of the data section.

Before:
text data bss dec hex filename
12503 5088 0 17591 44b7 drivers/pinctrl/actions/pinctrl-s500.o

After:
text data bss dec hex filename
14435 3156 0 17591 44b7 drivers/pinctrl/actions/pinctrl-s500.o

Signed-off-by: Cristian Ciocaltea <[e-mail]>
Link: https://lore.kernel.org/r/24505deb08[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/actions/pinctrl-s500.c

···
 static PAD_PULLCTL_CONF(DNAND_D7, 2, 2, 1);
 
 /* Pad info table */
-static struct owl_padinfo s500_padinfo[NUM_PADS] = {
+static const struct owl_padinfo s500_padinfo[NUM_PADS] = {
 	[DNAND_DQS] = PAD_INFO_PULLCTL(DNAND_DQS),
 	[DNAND_DQSN] = PAD_INFO_PULLCTL(DNAND_DQSN),
 	[ETH_TXD0] = PAD_INFO_ST(ETH_TXD0),