regulator: lp872x: make a const array static, makes object smaller

Don't populate const array lp872x_num_regulators  on the stack but
instead make it static. Makes the object code smaller by 29 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  18441	   4624	     64	  23129	   5a59	drivers/regulator/lp872x.o

After:
   text	   data	    bss	    dec	    hex	filename
  18316	   4720	     64	  23100	   5a3c	drivers/regulator/lp872x.o

(gcc version 10.2.0)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201016222235.686981-1-colin.king@canonical.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/lp872x.c

@@ -892,7 +892,7 @@ static int lp872x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	struct lp872x *lp;
 	struct lp872x_platform_data *pdata;
 	int ret;
-	const int lp872x_num_regulators[] = {
+	static const int lp872x_num_regulators[] = {
 		[LP8720] = LP8720_NUM_REGULATORS,
 		[LP8725] = LP8725_NUM_REGULATORS,
 	};