bnxt_en: Define the doorbell offsets on 57500 chips.

Define the 57500 chip doorbell offsets instead of using the magic
values in the C file.
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -5355,9 +5355,9 @@ static void bnxt_set_db(struct bnxt *bp, struct bnxt_db_info *db, u32 ring_type,
 {
 	if (bp->flags & BNXT_FLAG_CHIP_P5) {
 		if (BNXT_PF(bp))
-			db->doorbell = bp->bar1 + 0x10000;
+			db->doorbell = bp->bar1 + DB_PF_OFFSET_P5;
 		else
-			db->doorbell = bp->bar1 + 0x4000;
+			db->doorbell = bp->bar1 + DB_VF_OFFSET_P5;
 		switch (ring_type) {
 		case HWRM_RING_ALLOC_TX:
 			db->db_key64 = DBR_PATH_L2 | DBR_TYPE_SQ;

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -537,6 +537,9 @@ struct nqe_cn {
 #define DBR_TYPE_NQ_ARM					(0xbULL << 60)
 #define DBR_TYPE_NULL					(0xfULL << 60)
 
+#define DB_PF_OFFSET_P5					0x10000
+#define DB_VF_OFFSET_P5					0x4000
+
 #define INVALID_HW_RING_ID	((u16)-1)
 
 /* The hardware supports certain page sizes.  Use the supported page sizes