tg3: Clarify semantics of TG3_IRQ_MAX_VECS

TG3_IRQ_MAX_VECS should be seen as the maximum number of vectors that
any device could be expected to use.  tp->irq_max represents the maximum
number of vectors the current device can use.  This patch clarifies the
semantics of the code to match the above description.

Reviewed-by: Benjamin Li <benli@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 5cd0653..d39426f 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2659,7 +2659,8 @@
 	dma_addr_t			rx_jmb_mapping;
 };
 
-#define TG3_IRQ_MAX_VECS 5
+#define TG3_IRQ_MAX_VECS_RSS		5
+#define TG3_IRQ_MAX_VECS		TG3_IRQ_MAX_VECS_RSS
 
 struct tg3_napi {
 	struct napi_struct		napi	____cacheline_aligned;