dt-bindings: arm: idle-states: Correct references to wake-up delay

wakeup-delay = exit-latency + max(entry-latency - (now - entry-timestamp), 0)

wakeup-delay = exit-latency + max(entry-latency - (now - entry-timestamp), 0)

In other words, the scheduler can make its scheduling decision by selecting

In other words, the scheduler can make its scheduling decision by selecting

(e.g. waking-up) the CPU with the shortest wake-up latency.

(e.g. waking-up) the CPU with the shortest wake-up delay.

The wake-up latency must take into account the entry latency if that period

The wake-up delay must take into account the entry latency if that period

has not expired. The abortable nature of the PREP period can be ignored

has not expired. The abortable nature of the PREP period can be ignored

if it cannot be relied upon (e.g. the PREP deadline may occur much sooner than

if it cannot be relied upon (e.g. the PREP deadline may occur much sooner than

the worst case since it depends on the CPU operating conditions, i.e. caches

the worst case since it depends on the CPU operating conditions, i.e. caches