arm: dts: mt7623: fix all Warnings (unit_address_vs_reg)

Fix below a lot of Warnings (unit_address_vs_reg) that dtc complains so
much for

Node /oscillator@1 has a unit name, but no reg property
Node /oscillator@0 has a unit name, but no reg property
Node /pinctrl@10005000/cir@0 has a unit name, but no reg property
Node /pinctrl@10005000/i2c@0 has a unit name, but no reg property
Node /pinctrl@10005000/i2c@1 has a unit name, but no reg property
Node /pinctrl@10005000/i2s@0 has a unit name, but no reg property
Node /pinctrl@10005000/i2s@1 has a unit name, but no reg property
Node /pinctrl@10005000/keys@0 has a unit name, but no reg property
Node /pinctrl@10005000/leds@0 has a unit name, but no reg property
Node /pinctrl@10005000/pwm@0 has a unit name, but no reg property
Node /pinctrl@10005000/spi@0 has a unit name, but no reg property
Node /pinctrl@10005000/uart@0 has a unit name, but no reg property
Node /pinctrl@10005000/uart@1 has a unit name, but no reg property
Node /pinctrl@10005000/uart@2 has a unit name, but no reg property
Node /ethernet@1b100000/mdio-bus/switch@0/ports has a reg or ranges
property, but no unit name

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>