[openwrt/openwrt] ethtool: drop dependency on kernel 6.6

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/15f2a8c4f2fb2815187a2f94c822cbba0cbe7778

commit 15f2a8c4f2fb2815187a2f94c822cbba0cbe7778
Author: Christian Marangi <ansuelsmth at gmail.com>
AuthorDate: Thu Nov 27 12:47:33 2025 +0100

    ethtool: drop dependency on kernel 6.6
    
    Since now we default to 6.12 and we dropped any support for kernel 6.6,
    drop any dependency on it.
    
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 package/network/utils/ethtool/Makefile | 2 --
 1 file changed, 2 deletions(-)

diff --git a/package/network/utils/ethtool/Makefile b/package/network/utils/ethtool/Makefile
index 991ee293a9..163ba2daa1 100644
--- a/package/network/utils/ethtool/Makefile
+++ b/package/network/utils/ethtool/Makefile
@@ -58,9 +58,7 @@ CONFIGURE_ARGS += --disable-netlink --disable-pretty-dump
 endif
 
 # enable support for input_xfrm with kernels newer than 6.6
-ifeq ($(CONFIG_LINUX_6_6),)
 CONFIGURE_ARGS += --enable-rss-input-xfrm
-endif
 
 define Package/ethtool/install
 	$(INSTALL_DIR) $(1)/usr/sbin