remoteproc: stm32: Fix pointer assignement

Fix the assignment of the @state pointer - it is obviously wrong.

Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Fixes: 376ffdc0 ("remoteproc: stm32: Properly set co-processor state when attaching")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200831213758.206690-1-mathieu.poirier@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>