[Issue]
ICE appears when passing -mfloat-gprs=double for e500v2 target build with
gcc-4.8.1, the bug url is: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57717#c1
[Workaround]
Replace double-float with single-float for e500v2 build until the ICE is fixed
[TODO]
Revert the commit when the ICE bug is fixed.
Signed-off-by: Zhenhua Luo <zhenhua.luo@freescale.com> Acked-by: Otavio Salvador <otavio@ossystems.com.br>