kernel/arm64: Enable ENA driver
The new AWS A1 instances use the ENA network driver.
Enable it.
@@ -1927,7 +1927,7 @@ CONFIG_MDIO=m
# CONFIG_NET_VENDOR_ALTEON is not set
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
-# CONFIG_ENA_ETHERNET is not set
+CONFIG_ENA_ETHERNET=m
# CONFIG_NET_VENDOR_AMD is not set
# CONFIG_NET_VENDOR_AQUANTIA is not set
# CONFIG_NET_VENDOR_ARC is not set
