Drop support for armv6l (and armv7hl)

This removes support for building IPFire for 32 bit ARM architectures.

This has been decided in August 2022 with six months notice as there are
not very many users and hardware is generally not available any more.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/initscripts/system/sysctl

@@ -29,12 +29,7 @@ case "${1}" in
 			sysctl -q -p
 			evaluate_retval
 		fi
-		arch=`uname -m`
-		case "${arch}" in
-			armv*)
-				arch="armv6l":
-				;;
-		esac
+		arch="$(uname -m)"
 		if [ -f "/etc/sysctl-${arch}.conf" ]; then
 			boot_mesg "Setting ${arch}-kernel runtime parameters..."
 			sysctl -q -p /etc/sysctl-${arch}.conf