Revert "Revert "riscv: sifive: fu540: Add gpio-restart support""

This reverts commit 23da3c682a84a2ad67a67287979dd4f5259ff607.

Now the build failure of sifive_fu540_defconfig board has been fixed,
revert this "revert patch".

Signed-off-by: Bin Meng <bin.meng@windriver.com>
1 file changed