Add riscv user in wheel group

Keep the password simple -- riscv.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>

fedora-riscv64-developer-rawhide.ks

@@ -9,12 +9,16 @@ lang en_US.UTF-8
 keyboard us
 # short hostname still allows DHCP to assign domain name
 network --bootproto dhcp --device=link --hostname=fedora-riscv
-rootpw riscv
+rootpw --plaintext riscv
 firewall --enabled --ssh
 timezone --utc America/New_York
 selinux --disabled
 services --enabled=sshd,NetworkManager,chronyd,haveged --disabled=lm_sensors
 
+# Fedora 31
+# https://fedoraproject.org/wiki/Changes/DisableRootPasswordLoginInSshd
+user --name riscv --groups=wheel --plaintext --password=riscv
+
 bootloader --location=none --extlinux
 
 zerombr
@@ -297,7 +301,9 @@ Build date: $(date --utc)
 
 Kernel \r on an \m (\l)
 
-The root password is ‘riscv’.
+The root password is 'riscv'.
+root password logins are disabled in SSH starting Fedora 31.
+User 'riscv' with password 'riscv' in 'wheel' group is also provided.
 
 To install new packages use 'dnf install ...'