ethtool: drop rss-input-xfrm compatibility patch

The rss-input-xfrm workaround for Linux 6.6 is no longer needed with
current kernel versions. Remove the patch and the associated
--enable-rss-input-xfrm configure flag.

Link: openwrt#22841
Signed-off-by: Nick Hainke <vincent@systemli.org>

Author: PolynomialDivision

package/network/utils/ethtool/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ethtool
 PKG_VERSION:=6.19
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
@@ -61,9 +61,6 @@ else
 CONFIGURE_ARGS += --disable-netlink --disable-pretty-dump
 endif
 
-# enable support for input_xfrm with kernels newer than 6.6
-CONFIGURE_ARGS += --enable-rss-input-xfrm
-
 define Package/ethtool/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ethtool $(1)/usr/sbin