mmc: pwrseq: Use bitmap_free() to free bitmap

kfree() and bitmap_free() are the same. But using the later is more
consistent when freeing memory allocated with bitmap_alloc().
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/07a8e48db446888bd77f16b88568e80904f52103.1640528089.git.christophe.jaillet@wanadoo.frSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/pwrseq_simple.c

@@ -54,7 +54,7 @@ static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq,
 		gpiod_set_array_value_cansleep(nvalues, reset_gpios->desc,
 					       reset_gpios->info, values);
 
-		kfree(values);
+		bitmap_free(values);
 	}
 }