pinctrl: rzn1: Make array reg_drive static, makes object smaller

Don't populate the array reg_drive on the stack but instead make it
static. Makes the object code smaller by 32 bytes.

Before:
text data bss dec hex filename
31991 15696 0 47687 ba47 drivers/pinctrl/pinctrl-rzn1.o

After:
text data bss dec hex filename
31863 15792 0 47655 ba27 drivers/pinctrl/pinctrl-rzn1.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Geert Uytterhoeven <[e-mail]>

drivers/pinctrl/pinctrl-rzn1.c

···
 {
 	struct rzn1_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
 	enum pin_config_param param = pinconf_to_config_param(*config);
-	const u32 reg_drive[4] = { 4, 6, 8, 12 };
+	static const u32 reg_drive[4] = { 4, 6, 8, 12 };
 	u32 pull, drive, l1mux;
 	u32 l1, l2, arg = 0;