remoteproc: wcss: Fix arguments passed to qcom_add_glink_subdev()

Recently qcom_add_glink_subdev() was extended to also take the glink_ssr
identifier as an argument and I missed this while applying '8a226e2c
("remoteproc: wcss: add support for rpmsg communication")'.

Fixes: 8a226e2c

 ("remoteproc: wcss: add support for rpmsg communication")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200514185856.1598945-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>