meta-quanta: gbs: Remove autotools specific config

We want to use packageconfig options instead of build system specific
ones.

Change-Id: Ib0b293c457ea418e98d294da9796c7b103209888
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-quanta/meta-gbs/recipes-phosphor/network/phosphor-network_%.bbappend b/meta-quanta/meta-gbs/recipes-phosphor/network/phosphor-network_%.bbappend
index 7bf73ae..9caf61e 100644
--- a/meta-quanta/meta-gbs/recipes-phosphor/network/phosphor-network_%.bbappend
+++ b/meta-quanta/meta-gbs/recipes-phosphor/network/phosphor-network_%.bbappend
@@ -1,3 +1,2 @@
-EXTRA_OECONF_append_gbs = " --enable-nic-ethtool=yes"
-
+PACKAGECONFIG_append_gbs = " nic-ethtool"
 PACKAGECONFIG_remove_gbs = "uboot-env"