fpga: arria10: Fix error in fpga pin configuration

Pin configuration of the FPGA devicetree block should be done
after core configuration in the arria10 fpga driver.  This fix
corrects the check of status, and ensures that the fpga pin mux
is configured on correct configuration of the core fpga image.

Signed-off-by: Dalon Westergreen <dalon.westergreen@intel.com>