MAINTAINERS: net: update sfc maintainers

Add myself and Edward Cree as maintainers.
Remove Shradha Shah, who is on extended leave.

Cc: David S. Miller <davem@davemloft.net>
Cc: Edward Cree <ecree@solarflare.com>
Cc: Shradha Shah <sshah@solarflare.com>
Signed-off-by: NBert Kenward <bkenward@solarflare.com>
Acked-by: NEdward Cree <ecree@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -10014,7 +10014,8 @@ F:	drivers/infiniband/hw/ocrdma/
 
 SFC NETWORK DRIVER
 M:	Solarflare linux maintainers <linux-net-drivers@solarflare.com>
-M:	Shradha Shah <sshah@solarflare.com>
+M:	Edward Cree <ecree@solarflare.com>
+M:	Bert Kenward <bkenward@solarflare.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/sfc/