powerpc/booke: Add CPU_FTR_EMB_HV check for e5500.

Added CPU_FTR_EMB_HV feature check for e5500.

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>