Revert "Make kernel compatible with gcc <=4.8"

This reverts commit 80ddf36aa2070d2ac0c0dd2957b167249d9a1554.
LINARO: linaro 4.7.2 2012.09 -O3 compliance fixes

Change-Id: Ibecc6ca7ff04445f69adbf84d170e32e9ff138ce
fix compile with gcc 4.8.1

Change-Id: I20f5f5608cf2d6ef89a3850005bfd5206e1f936e