MAINTAINERS: Remove myself as co-maintainer for qcom-ethqos

As I am no longer with Linaro, I no longer have access to documentation
for this IP. The Linaro email will start bouncing soon.

Vinod is fully capable to maintain this driver by himself, therefore
remove myself as co-maintainer for qcom-ethqos.

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -13679,7 +13679,6 @@ F:	drivers/net/ethernet/qualcomm/emac/
 
 QUALCOMM ETHQOS ETHERNET DRIVER
 M:	Vinod Koul <vkoul@kernel.org>
-M:	Niklas Cassel <niklas.cassel@linaro.org>
 L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c