staging: gs_fpgaboot: cleanup in gs_fpgaboot_init function

the error path is cleanup to return the correct (function call return value)
error code.

Signed-off-by: Devendra Naga <devendranaga4@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/gs_fpgaboot/gs_fpgaboot.c
Simple merge