wifi: p54: Use the bitmap API to allocate bitmaps

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/2755b8b7d85a2db0663d39ea6df823f94f3401b3.1656939750.git.christophe.jaillet@wanadoo.fr

drivers/net/wireless/intersil/p54/fwio.c

@@ -173,10 +173,8 @@ int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 		 * keeping a extra list for uploaded keys.
 		 */
 
-		priv->used_rxkeys = kcalloc(BITS_TO_LONGS(priv->rx_keycache_size),
-					    sizeof(long),
-					    GFP_KERNEL);
-
+		priv->used_rxkeys = bitmap_zalloc(priv->rx_keycache_size,
+						  GFP_KERNEL);
 		if (!priv->used_rxkeys)
 			return -ENOMEM;
 	}

drivers/net/wireless/intersil/p54/main.c

@@ -831,7 +831,7 @@ void p54_free_common(struct ieee80211_hw *dev)
 	kfree(priv->output_limit);
 	kfree(priv->curve_data);
 	kfree(priv->rssi_db);
-	kfree(priv->used_rxkeys);
+	bitmap_free(priv->used_rxkeys);
 	kfree(priv->survey);
 	priv->iq_autocal = NULL;
 	priv->output_limit = NULL;