usb: gsi: Initialize 'info' with zero

Initialize the local variable 'info' with zero to
prevent un-initialized access. Since the buffer is
copied to user as well, this will prevent the exposure
of data in the un-initialized buffer.

Change-Id: Ia63d15cd90411934e7c4eb4130da0c5e7f2db706
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>