ethtool: upgrade 5.14 -> 5.15

(From OE-Core rev: a8af54d73dabca557fcc7b12eca29b28517933b6)

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/ethtool/ethtool/avoid_parallel_tests.patch

@@ -19,7 +19,7 @@ index 6c9453c..7c0f829 100644
 --- a/configure.ac
 +++ b/configure.ac
 @@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
- AC_INIT(ethtool, 5.14, netdev@vger.kernel.org)
+ AC_INIT(ethtool, 5.15, netdev@vger.kernel.org)
  AC_PREREQ(2.52)
  AC_CONFIG_SRCDIR([ethtool.c])
 -AM_INIT_AUTOMAKE([gnu subdir-objects])

meta/recipes-extended/ethtool/ethtool_5.15.bb

@@ -11,7 +11,7 @@ SRC_URI = "${KERNELORG_MIRROR}/software/network/ethtool/ethtool-${PV}.tar.gz \
            file://avoid_parallel_tests.patch \
            "
 
-SRC_URI[sha256sum] = "9868604c913e5483000c00d5dcb2bb3169a05252de47f62174702ff19cf6de7a"
+SRC_URI[sha256sum] = "a6a1638192209269ca74a29d73903f28531ebdf0794f3e0bdfdbdee2dc75d98b"
 
 UPSTREAM_CHECK_URI = "https://www.kernel.org/pub/software/network/ethtool/"