A unit load is defined to be 100mA. The number of unit loads a device can draw is an absolute maximum, not an average over time. A device may be either low-power at one unit load or high-power, consuming up to five unit loads. All devices default to low-power. The transition to high-power is under software control. It is the responsibility of software to ensure adequate power is available before allowing devices to consume high-power.
The idea of an all-in-one was foreign before the the iMac
You mean, like the original Mac from 1984?
The Freescale chip in question is an ARM -- the i.MX31 (this driver is actually for the power management companion IC). Freescale does not and never has made low power x86 chips. In fact, being the spin-off of Motorola's semiconductor division and the home of the 68K processor line, they would probably find that suggestion offensive!
"The number of Unix installations has grown to 10, with more expected." -- The Unix Programmer's Manual, 2nd Edition, June, 1972