arm: zynq: Add support for cpufreq

The generic cpufreq-cpu0 driver can scale the CPU frequency on Zynq
SOCs. Add the required platform device to the BSP and appropriate
OPPs to the dts.

Cc: Rob Herring <[email protected]>
Cc: Pawel Moll <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Ian Campbell <[email protected]>
Cc: Kumar Gala <[email protected]>
Cc: Russell King <[email protected]>
Cc: [email protected]
Signed-off-by: Soren Brinkmann <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Acked-by: Michal Simek <[email protected]>
3 files changed