On Odroid XU the SD card driver comes up and finds a card but for card
access it seems that we would need a platform driver like on Arndale.
On imx_53, the first SDHCI MMIO access faults. This is likely due to the
AIPSTZ memory bridge. On HW, we initialize the AIPSTZ in the kernel, but
when I tried doing that in the platform driver instead, the first AIPSTZ
MMIO access faults ^^ So I gave up for now and removed support.
Fixes#2259
Most implementations use a Signal_handler now to acknowledge the packet
instead of waiting for the transfer completion. The exceptions to that are
the non-DMA implementations for RPI and PL180
Ref #2206
This patch changes the top-level directory layout as a preparatory
step for improving the tools for managing 3rd-party source codes.
The rationale is described in the issue referenced below.
Issue #1082
