mmc: sdio: Update the buffer copy to include the last char

During the copy the last character was getting truncated.
Update the buffer copy to include all the characters.

CRs-Fixed: 499579
Change-Id: I8e1df1d1f2294e85068aebcc876bef701e088b07
Signed-off-by: Pratibhasagar V <pratibha@codeaurora.org>
1 file changed