board: presidio-asic: update eMMC DT information

Change DT compatibility name to match change in driver's name.
Remove unused io_ds and fifo_mode fields from DT.

Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>
CC: Peng Fan <peng.fan@nxp.com>
CC: Jaehoon Chung <jh80.chung@samsung.com>
CC: Tom Rini <trini@konsulko.com>