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

Commit c89b09ce ("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: Icdd065045d6b25ca1306a5af04a680ac0a4e7645
Signed-off-by: Siba Prasad <sibap@codeaurora.org>