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/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 33a4b6f..52ce08b 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -345,6 +345,13 @@
 
 endif #PHYLIB
 
+config FSL_MEMAC
+	bool "NXP mEMAC PHY support"
+
+config SYS_MEMAC_LITTLE_ENDIAN
+	bool "mEMAC is access in little endian mode"
+	depends on FSL_MEMAC || FSL_LS_MDIO
+
 config PHY_RESET_DELAY
 	int "Extra delay after reset before MII register access"
 	default 0