arm: dts: k3-am654-r5-base-board: Fix power-domains for wkup_vtm0

arm: dts: k3-am654-r5-base-board: Fix power-domains for wkup_vtm0

wkup_vtm populates only 1 power-domain cell in it's node. But the
power-domain cell are defined as 2. Due to this the following warning
comes during build:

arch/arm/dts/k3-am654-r5-base-board.dtb: Warning (power_domains_property):
/interconnect@100000/interconnect@28380000/interconnect@42040000/
wkup_vtm@42050000:power-domains: property size (8) too small for cell size 2

Fix this by updating the power-domain cells.

Fixes: cfa6bd549c ("arm: dts: k3-am654-r5-base-board: Add VTM node")
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>