HSU: Use spin_lock/unlock variant in ISR.

HSU: Use spin_lock/unlock variant in ISR.

BZ: 19018

Kernel is expecting to execute ISRs with interrupt disabled,
using spin_lock/unlock_irq variant in ISR would cause interrupt to
be enabled, thus causing a kernel warning.

Change-Id: I7efe94dc704cdcb3042a3c2524520a8b1d4550d8
Signed-off-by: Fei Yang <fei.yang@intel.com>
Reviewed-on: http://android.intel.com:8080/31925
Reviewed-by: Kuppuswamy, Sathyanarayanan <sathyanarayanan.kuppuswamy@intel.com>
Reviewed-by: Mansoor, Illyas <illyas.mansoor@intel.com>
Reviewed-by: Du, Alek <alek.du@intel.com>
Tested-by: Wang, Zhifeng <zhifeng.wang@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>