ethtool: fix recursive dependency

Change the CONFLICTS definition from the alternative package
(ethtool-full) to the main one.

The CONFLICTS line creates a dependency to the conflicting package.

Right now, the dependency would be created in the PACKAGE_ethtool-full
symbol:

config PACKAGE_ethtool-full
        depends on m || (PACKAGE_ethtool != y)

When the main package is selected by airmon-ng, it selects
PACKAGE_ethtool, *depending* on the value of PACKAGE_ethtool-full:

config PACKAGE_airmon-ng
        select PACKAGE_ethtool if PACKAGE_ethtool-full<PACKAGE_airmon-ng

In the first block, the value of PACKAGE_ethtool-full depends on the
value of PACKAGE_ethtool.  In the second block, the opposite is true:
the value of PACKAGE_ethtool depends on the value of
PACKAGE_ethtool-full.  This is a recursive dependency.

Fix it by changing the package where the dependency is created, so that
only the value of PACKAGE_ethtool will depend on PACKAGE_ethtool-full.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

package/network/utils/ethtool/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ethtool
 PKG_VERSION:=5.13
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
@@ -31,6 +31,7 @@ define Package/ethtool
   TITLE:=Display or change ethernet card settings
   URL:=http://www.kernel.org/pub/software/network/ethtool/
   VARIANT:=tiny
+  CONFLICTS:=ethtool-full
 endef
 
 define Package/ethtool-full
@@ -38,8 +39,8 @@ define Package/ethtool-full
   TITLE += (full)
   VARIANT:=full
   PROVIDES:=ethtool
-  CONFLICTS:=ethtool
   DEPENDS:=+libmnl
+  CONFLICTS:=
 endef
 
 define Package/ethtool/description