ARM: 8649/2: nommu: remove Hivecs configuration is asm

Now that exception based address is handled dynamically for
processors with CP15, remove Hivecs configuration in assembly.

Signed-off-by: afzal mohammed <afzal.mohd.ma@gmail.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>