ethtool: bump to version 3.18

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	d6e0dd3fa904c3ad87487c66a4a8fde1ebc4194979ca5755df4b2efb247ca286	ethtool-3.16.tar.xz
+sha256	813ffe59fddd2db423c578448b10e33e2e2d4cc2ba780f1f0c603642b20342f6	ethtool-3.18.tar.xz

package/ethtool/ethtool.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ETHTOOL_VERSION = 3.16
+ETHTOOL_VERSION = 3.18
 ETHTOOL_SOURCE = ethtool-$(ETHTOOL_VERSION).tar.xz
 ETHTOOL_SITE = $(BR2_KERNEL_MIRROR)/software/network/ethtool
 ETHTOOL_LICENSE = GPLv2