voltage3V3_v - the sensor 3.3V voltage rail
v3v3_valid - the value of voltage3V3_v may be 0. This
field is a 1 when the HW provides voltage3V3_v
brick_valid - is now a bit mask. A 1 in the postion inticate the
Power controler HW has a valid supply voltage
present (in V window) on that priority
(channel V1..Vn).
The mapping is formed by 1<<battery_status.msg.priority
or using the manifest constanst BRICKn_VALID_MASK
usb_vaild - is now indicated from the Power controler HW or
the usb_connected if Power controler is
not present.
brick_valid == 0 and usb_vaild = 1 implies the FMU is powered
from USB only
brick_valid != 0 and usb_vaild = 1 implies the FMU is powered
from the higest priority brick, providing a 1 bit in brick_valid
and from USB