Cross Reference: /external/u-boot/doc/device-tree-bindings/timer

`Name`	`Date`	`Size`
Up to higher level directory
`altera_timer.txt`	22-Oct-2020	`503`
`arc_timer.txt`	22-Oct-2020	`470`
`atcpit100_timer.txt`	22-Oct-2020	`1,000`
`sandbox_timer.txt`	22-Oct-2020	`144`