Add i.MX7D SABRESD board BSP codes, with enabled modules:
UART, PMIC, USB/OTG, SD, eMMC, ENET, I2C, 74LV IOX.
Build target: mx7dsabresd_config
Signed-off-by: Peng Fan
Signed-off-by: Fugang Duan
Signed-off-by: Ye.Li
(cherry picked from commit 3bf52a153e2964d4fdc17f0e8cb816686cbb6c2b)
Conflicts:
boards.cfg