Staging: gs_fpgaboot: fix memory allocation in gs_fpgaboot.c

This is a patch for gs_fpgaboot.c that fixes a memory allocation problem
identified by checkpatch.pl.

Signed-off-by: Ben Marsh <bmarsh94@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>