dietpi-installer: add passwd as dependency and Radxa Zero kernel family

On Forky, cron dropped the adduser > passwd dependency, rendering ifupdown as the only left core package, which keeps passwd installed. We do not install ifupdown on container images, but strictly need passwd for several scripts. And of course, it is still the standard tool to manage users and their passwords from console.

The kernel family for the Radax Zero was an oversight, when the default was changed from meson64 to empty string.

Author: MichaIng

.build/images/dietpi-installer

@@ -970,6 +970,7 @@ _EOF_'
 			'locales'		# Support locales, used by dietpi-config > Language/Regional Options > Locale
 			'mawk'			# Minimal awk implementation
 			'nano'			# Simple text editor
+			'passwd'		# useradd/usermod/chpasswd/...
 			'parted'		# partprobe + drive partitioning, used by DietPi-Drive_Manager
 			'procps'		# "kill", "ps", "pgrep", "sysctl", used by several DietPi scripts
 			'psmisc'		# "killall", used by several DietPi scripts
@@ -1152,7 +1153,7 @@ _EOF_
 						*) model='rockpi-4b';;
 					esac;;
 				73) model='rockpi-s' kernel='rockchip64';;
-				74) model='radxa-zero';;
+				74) model='radxa-zero' kernel='meson64';;
 				76) kernel='rockchip64'
 					case $HW_VARIANT in
 						2) model='nanopi-r5c';;