bnx2x: Support loading cnic resources at run-time

This patch replaces the BCM_CNIC define with a flag which can change at run-time
and which does not use the CONFIG_CNIC kconfig option.
For the PF/hypervisor driver cnic is always supported, however allocation of
cnic resources and configuration of the HW for offload mode is done only when
the cnic module registers bnx2x.

Signed-off-by: Merav Sicron <meravs@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
index e2e45ee..a2b9465 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
@@ -11998,7 +11998,7 @@
 	bnx2x_set_led(params, vars, LED_MODE_OPER, vars->line_speed);
 }
 
-static void bnx2x_set_rx_filter(struct link_params *params, u8 en)
+void bnx2x_set_rx_filter(struct link_params *params, u8 en)
 {
 	struct bnx2x *bp = params->bp;
 	u8 val = en * 0x1F;