regulator: rt6245: make a const array func_base static, makes object smaller

Don't populate the const array func_base on the stack but instead it
static. Makes the object code smaller by 55 bytes:

Before:
   text    data     bss     dec    hex filename
   6422    3216      64    9702   25e6 drivers/regulator/rt6245-regulator.o

After:
   text    data     bss     dec    hex filename
   6303    3280      64    9647   25af drivers/regulator/rt6245-regulator.o

Reduction of 55 bytes

(gcc version 10.3.0)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210715141531.27672-1-colin.king@canonical.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/rt6245-regulator.c

@@ -144,7 +144,7 @@ static int rt6245_init_device_properties(struct device *dev)
 static int rt6245_reg_write(void *context, unsigned int reg, unsigned int val)
 {
 	struct i2c_client *i2c = context;
-	const u8 func_base[] = { 0x6F, 0x73, 0x78, 0x61, 0x7C, 0 };
+	static const u8 func_base[] = { 0x6F, 0x73, 0x78, 0x61, 0x7C, 0 };
 	unsigned int code, bit_count;
 
 	code = func_base[reg];