net/ncsi: Disable global multicast filter

Disabling multicast filtering from NCSI if it is supported. As it
should not filter any multicast packets. In current code, multicast
filter is enabled and with an exception of optional field supported
by device are disabled filtering.

Mainly I see if goal is to disable filtering for IPV6 packets then let
it disabled for every other types as well. As we are seeing issues with
LLDP not working with this enabled filtering. And there are other issues
with IPV6.

By Disabling this multicast completely, it is working for both IPV6 as
well as LLDP.

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

net/ncsi/internal.h

@@ -264,9 +264,7 @@ enum {
 	ncsi_dev_state_config_ev,
 	ncsi_dev_state_config_sma,
 	ncsi_dev_state_config_ebf,
-#if IS_ENABLED(CONFIG_IPV6)
-	ncsi_dev_state_config_egmf,
-#endif
+	ncsi_dev_state_config_dgmf,
 	ncsi_dev_state_config_ecnt,
 	ncsi_dev_state_config_ec,
 	ncsi_dev_state_config_ae,
@@ -295,9 +293,6 @@ struct ncsi_dev_priv {
 #define NCSI_DEV_RESET		8            /* Reset state of NC          */
 	unsigned int        gma_flag;        /* OEM GMA flag               */
 	spinlock_t          lock;            /* Protect the NCSI device    */
-#if IS_ENABLED(CONFIG_IPV6)
-	unsigned int        inet6_addr_num;  /* Number of IPv6 addresses   */
-#endif
 	unsigned int        package_probe_id;/* Current ID during probe    */
 	unsigned int        package_num;     /* Number of packages         */
 	struct list_head    packages;        /* List of packages           */