drm/i915/dp: Fix the t11_t12 panel power cycle delay from VBT read

drm/i915/dp: Fix the t11_t12 panel power cycle delay from VBT read

When we read the VBT t11_t12 value for panel power cycle delay,
it is a zero based value so we need to 100ms to that. And then it
needs to be multiplied by 10 to store it in 100usecs unit same as
SW VBT.

v3:
* Add it as part of series
v2:
* Change the VBT value instead of HW readout and pp div (Ville Syrjala)

Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Clint Taylor <clinton.a.taylor@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1498504905-21067-1-git-send-email-manasi.d.navare@intel.com
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>