uvnic issues

uvnic issues

When there is Heartbeat loss because of Link event on  EDR fabric, uvnic
recovery fails(some times).
This is due to the fact that XVE_OPER_UP state would have cleared and
xve driver has to check this once multicast group membership is retained

While running MAXq test we are running into soft crash around
skb_try_coalesce .Since xve driver allocates PAGE_SIZE it has to use
full PAGE_SIZE for truesize of skb.

xve driver doesn't allocate enough tailroom in skbs, so IP/TCP
stacks need to reallocate skb head to pull IP/TCP headers.
this .

xve allocates some resources which are not needed by uVnic
functionality.
Fix this by using cm_supported flag.

Orabug: 22862488

Reported-by: ye jin <ye.jin@oracle.com>
Signed-off-by: Pradeep Gopanapalli <pradeep.gopanapalli@oracle.com>
Reviewed-by: sajid zia <szia@oracle.com>
Signed-off-by: Qing Huang <qing.huang@oracle.com>