Merge tag 'renesas-r8a7740-ccf-and-timers-for-v3.18' into dt-timers-for-v3.18

Renesas ARM Based SoC R8a7740 CCF and Timers Updates for v3.18

When booting using the r8a7740/armadillo800eva using dt-reference:
* Use CCF to initialise clocks via DT
* Initialise timers via DT