Enable the SD Card reader and the internal eMMC on the Berlin BG2Q DMP
using two of the SDHCI nodes of the Berlin BG2Q.
Signed-off-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

Adds initial support for the Marvell BG2-Q DMP. The board has 2GB of
memory, an uart activated and what's initially supported by the Marvell
Armada 1500 pro dtsi.
Signed-off-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>