MLK-20955 imx8qm: delete power-domains for lpuart0 on xen

MLK-20955 imx8qm: delete power-domains for lpuart0 on xen

To U-Boot on DomU, the lpuart0 is replaced with a xen paravirtual
consol driver, but reused the previous lpuart node. However
there is an power-domains entry in lpuart0 which will call
power_domain_on and failed to probe xen paravirtual driver,
because of recent change:
commit 8524ca764d8f("MLK-20945-2 dm: device: Check the power up result in probe ")

So remove the power-domains entry in lpuart0 to let DomU U-Boot could
output again.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Flynn xu <flynn.xu@nxp.com>
(cherry picked from commit 38155100481a07e961f375052241d9d03e20a899)
(cherry picked from commit 92104edf74363ab1a322e186887bf4515d47aa9c)
(cherry picked from commit 75074ecb28d47cb1064d10e3d0b85defd7fb3c87)
(cherry picked from commit 10d04fd3f248e1a2f084811768c4690d2bcb2f89)