ppa/fm/qe: use block layer in ppa/fm/qe driver

At present the MMC subsystem maintains its own list of MMC devices.
This cannot work with driver model when CONFIG_BLK is enabled, use
blk_dread to replace previous mmc read interface, use
mmc_get_blk_desc to get the mmc device property.

Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
[York S: reformatted commit message]
Reviewed-by: York Sun <york.sun@nxp.com>
3 files changed