amba-pl011: added sleep and clock management features

Feature tested with LTP related test and Lauterbach debugger

ST-Ericsson ID: AP257919

Signed-off-by: Grzegorz Sygieda <grzegorz.sygieda@tieto.com>
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Change-Id: Ie5924e27856b478032f20af6c04d814f98491166
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/2422
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
2 files changed