Revert "mmc: card: block: check the user controlled parameters to avoid overflow"

Commit 4fc34e42 ("mmc: card: block: check the user controlled
parameters to avoid overflow") needs to be reverted since it causes
memory leak in an API, while exiting without freeing the allocated memory. 

Change-Id: I1b5cf6827b1c6663da308cc5eaa4b637226453e0
Signed-off-by: Siba Prasad <sibap@codeaurora.org>