ARM: domains: keep vectors in separate domain

Keep the machine vectors in its own domain to avoid software based
user access control from making the vector code inaccessible, and
thereby deadlocking the machine.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --cc arch/arm/include/asm/domain.h
Simple merge

diff --cc arch/arm/include/asm/pgtable-2level-hwdef.h
Simple merge

diff --cc arch/arm/mm/mmu.c
Simple merge

diff --cc arch/arm/mm/pgd.c
Simple merge