[U-Boot] mmc: meson: switch mmc slot order and allow to store environment in eMMC

[Heiner Kallweit]

In most cases Odroid C2 is used with a eMMC card. So far the eMMC slot
was assigned dev number 1 (0 is the SD slot). So on uboot prompt
we had to manually switch the mmc device first.
Therefore change the device number assignment. Thanks to Jaehoon for
the hint how to do it.

In addition allow to store the uboot environment in eMMC.

Heiner Kallweit (2):
  arm: dts: odroid-c2: assign mmc device number 0 to eMMC slot
  odroid-c2: support storing the uboot environment in eMMC

 arch/arm/dts/meson-gxbb-odroidc2.dts | 2 ++
 include/configs/meson-gxbb-common.h  | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

-- 
2.12.2