mmc: octeontx2: use device tree entries

commit 7b5929c59d83d5ea68d48b2acfe47113e89f5b03 from
git@git.assembla.com:cavium/WindRiver.linux.git

The characterstic of the device shall be determined
based on the parameters mentioned in the device tree
instead of hardcoding in the driver.

Change-Id: Icbadb0d9332397423d97f1e2459bdd961bcefca0
Signed-off-by: Sujeet Baranwal <sujeet.baranwal@cavium.com>
Reviewed-on: https://sj1git1.cavium.com/8538


Tested-by: Sunil Kovvuri Goutham <Sunil.Goutham@cavium.com>
Reviewed-by: Sujeet Kumar Baranwal <Sujeet.Baranwal@cavium.com>
Reviewed-by: Chandrakala Chavva <cchavva@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/26904


Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>