octeontx2-af: Remove redundant functions rvu_npc_exact_mac2u64()

The rvu_npc_exact_mac2u64() is used to convert an Ethernet MAC address
into a u64 value, as this is exactly what ether_addr_to_u64() does.
Use ether_addr_to_u64() to replace the rvu_npc_exact_mac2u64().
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Acked-by: Geethasowjanya Akula <gakula@marvell.com>
Link: https://lore.kernel.org/r/20230808114504.4036008-4-lizetao1@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_hash.c

@@ -390,22 +390,6 @@ int rvu_mbox_handler_npc_get_field_hash_info(struct rvu *rvu,
 	return 0;
 }
 
-/**
- *	rvu_npc_exact_mac2u64 - utility function to convert mac address to u64.
- *	@mac_addr: MAC address.
- *	Return: mdata for exact match table.
- */
-static u64 rvu_npc_exact_mac2u64(u8 *mac_addr)
-{
-	u64 mac = 0;
-	int index;
-
-	for (index = ETH_ALEN - 1; index >= 0; index--)
-		mac |= ((u64)*mac_addr++) << (8 * index);
-
-	return mac;
-}
-
 /**
  *	rvu_exact_prepare_mdata - Make mdata for mcam entry
  *	@mac: MAC address
@@ -416,7 +400,7 @@ static u64 rvu_npc_exact_mac2u64(u8 *mac_addr)
  */
 static u64 rvu_exact_prepare_mdata(u8 *mac, u16 chan, u16 ctype, u64 mask)
 {
-	u64 ldata = rvu_npc_exact_mac2u64(mac);
+	u64 ldata = ether_addr_to_u64(mac);
 
 	/* Please note that mask is 48bit which excludes chan and ctype.
 	 * Increase mask bits if we need to include them as well.
@@ -604,7 +588,7 @@ static u64 rvu_exact_prepare_table_entry(struct rvu *rvu, bool enable,
 					 u8 ctype, u16 chan, u8 *mac_addr)
 
 {
-	u64 ldata = rvu_npc_exact_mac2u64(mac_addr);
+	u64 ldata = ether_addr_to_u64(mac_addr);
 
 	/* Enable or disable */
 	u64 mdata = FIELD_PREP(GENMASK_ULL(63, 63), enable ? 1 : 0);