ethtool: bump to version 4.0

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ethtool/ethtool.hash

@@ -1,2 +1,2 @@
 # From https://www.kernel.org/pub/software/network/ethtool/sha256sums.asc
-sha256	813ffe59fddd2db423c578448b10e33e2e2d4cc2ba780f1f0c603642b20342f6	ethtool-3.18.tar.xz
+sha256	904887acc7d2f9c35dec04eb0e8a727a3205f346af4f4c95560ea3798de5ecff	ethtool-4.0.tar.xz

package/ethtool/ethtool.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ETHTOOL_VERSION = 3.18
+ETHTOOL_VERSION = 4.0
 ETHTOOL_SOURCE = ethtool-$(ETHTOOL_VERSION).tar.xz
 ETHTOOL_SITE = $(BR2_KERNEL_MIRROR)/software/network/ethtool
 ETHTOOL_LICENSE = GPLv2