[PORT FROM R2] atomisp: make delay in focus_status function variable

[PORT FROM R2] atomisp: make delay in focus_status function variable

BZ: 17272

this change assumes that one step needs 1ms of delay.The ammount
of steps changed times 1ms, maximised to 40ms, is then used to
wait before the focus_status function returns
ATOMISP_FOCUS_HP_COMPLETE again. This way the delay is no longer
fixed to 60ms after each call to t_focus.

Change-Id: Ie8ce0ecffff8933d1b91341741f6ff7e934a2a1d
Orig-Change-Id: Ia0419de7d14418dc63da8b1ab61988e36edaffa2
Reviewed-on: http://android.intel.com:8080/22864
Reviewed-by: Jong-a-lock, Robert <robert.jong-a-lock@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: Wang, Wen W <wen.w.wang@intel.com>
Reviewed-by: Samurov, Vitali <vitali.samurov@intel.com>
Reviewed-by: Cohen, David A <david.a.cohen@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
Reviewed-on: http://android.intel.com:8080/27991
Reviewed-by: Tuominen, TeemuX <teemux.tuominen@intel.com>