Convert CONFIG_FSL_MEMAC et al to Kconfig

This converts the following to Kconfig:
   CONFIG_FSL_MEMAC
   CONFIG_SYS_MEMAC_LITTLE_ENDIAN

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ls2080aqds_sdcard_defconfig b/configs/ls2080aqds_sdcard_defconfig
index e972842..e2710b8 100644
--- a/configs/ls2080aqds_sdcard_defconfig
+++ b/configs/ls2080aqds_sdcard_defconfig
@@ -91,6 +91,8 @@
 CONFIG_PHY_REALTEK=y
 CONFIG_PHY_TERANETICS=y
 CONFIG_PHY_VITESSE=y
+CONFIG_FSL_MEMAC=y
+CONFIG_SYS_MEMAC_LITTLE_ENDIAN=y
 CONFIG_PHY_GIGE=y
 CONFIG_E1000=y
 CONFIG_MII=y