configs: tqma6: enable DM for MDIO / PHY

Since this works with current device trees, enabled these.

Signed-off-by: Markus Niebel <Markus.Niebel@ew.tq-group.com>
diff --git a/configs/tqma6q_mba6_spi_defconfig b/configs/tqma6q_mba6_spi_defconfig
index 5407d09..8776aef 100644
--- a/configs/tqma6q_mba6_spi_defconfig
+++ b/configs/tqma6q_mba6_spi_defconfig
@@ -55,7 +55,10 @@
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
+CONFIG_DM_MDIO=y
+CONFIG_DM_ETH_PHY=y
 CONFIG_FEC_MXC=y
+CONFIG_RGMII=y
 CONFIG_MII=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y