[ARM] orion: sched_clock implementation for orion platforms
[ARM] orion: sched_clock implementation for orion platforms

sched_clock implementation for orion platform. Its realized using
free-running clocksource timer, which provides a resolution of 7.5ns
(depending on tclk). It's derived from PXA's sched_clock implementation.

[ nico: renamed orion2ns to tclk2ns, fixed max value in the comment ]

Signed-off-by: Stefan Agner <8bf81831f67286fff829779134e88c94b37210a1@yahoo.com>
Signed-off-by: Nicolas Pitre <d659c10e27d52b00987b65e85d99bce5480adcae@marvell.com>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas