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/ls1088aqds_sdcard_qspi_defconfig b/configs/ls1088aqds_sdcard_qspi_defconfig
index fa1f71d..1bd83af 100644
--- a/configs/ls1088aqds_sdcard_qspi_defconfig
+++ b/configs/ls1088aqds_sdcard_qspi_defconfig
@@ -103,6 +103,8 @@
 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