pia335x: WD_SET2 must be low to disable watchdog

- WD was set to 60 second interval (SET2 = HIGH)

Signed-off-by: Björn Krombholz <b.krombholz@pironex.de>
pia335x: make MUX config more consitent and readable

Signed-off-by: Björn Krombholz <b.krombholz@pironex.de>
pia35x: fix ETH mux and initialization

- cleanup init output
- mux MII2 for Ethernet
- do reset of switch master and all ports

Signed-off-by: Björn Krombholz <b.krombholz@pironex.de>