Change in coreboot[master]: drivers/storage: Split out ADMA support

[Lee Leahy (Code Review)]

Hello Andrey Petrov, Aaron Durbin, Bora Guvendik, build bot (Jenkins), Martin Roth,

I'd like you to reexamine a change.  Please visit

https://review.coreboot.org/19015

to look at the new patch set (#2).

Change subject: drivers/storage: Split out ADMA support
......................................................................

drivers/storage: Split out ADMA support

On x86 sysems DMA is only supported to RAM, early stages must do
programed I/O to send/receive data from the SD/MMC device.  Use Kconfig
values to enable DMA during early boot stages.

TEST=Build and run on reef

Change-Id: I70aad97c74aa8a72e50627740d96fecb7485dde4
Signed-off-by: Lee Leahy 
---
M src/drivers/storage/Kconfig
M src/drivers/storage/Makefile.inc
M src/drivers/storage/sdhci.c
A src/drivers/storage/sdhci_adma.c
M src/include/device/sdhci.h
5 files changed, 239 insertions(+), 178 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/15/19015/2