[PORT FROM R2]Factor code for writing the reboot reason in OSNIB

[PORT FROM R2]Factor code for writing the reboot reason in OSNIB

BZ: 14252

The previous code in intel_mid_osip.c was writing the reboot reason
using the mask 0x0f instead of 0x01. The right code was done in
intel_scu_ipcutil.c. Now the code is factored in intel_scu_ipcutil.c
Signed-off-by: Yann Puech <yannx.puech@intel.com>
Orig-Change-Id: I2945054b6bf2dc73e9275b8391e72d6f202e89a5

Conflicts:

	drivers/platform/x86/intel_scu_ipcutil.c

Change-Id: I3209f3747fd5b381689f121ca3c1a5ad1fc69f06
Signed-off-by: Eduardo Mendi <eduardox.mendi@intel.com>
Reviewed-on: http://android.intel.com:8080/33060
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>