This patch also cleans up two oscillators that provide clocks for MT7623.
Switch the uart clocks to the real ones while at it.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>