update arch-ppc.h, add defines for 32/64 bit

This patch updates KERNEL_ADDR and MODULE_ADDR for
32 and 64 bit powerpc systems.

KERNEL_ADDR
  # grep _text /proc/kallsyms | head -n1
  c000000000000000 T _text

MODULE_ADDR
As far as I can tell powerpc is using generic module_alloc(),
which allocates space via vmalloc. VMALLOC_START for 64bit
is 0x8000000000000000 (CONFIG_PPC_BOOK3E=y) or 0xD000000000000000.
This patch sets it to latter.

Signed-off-by: Jan Stancek <jstancek@redhat.com>
update arch-s390.h, MODULE_ADDR

KERNEL_ADDR
  # grep _text /proc/kallsyms | head -n1
  0000000000000000 T _text

MODULE_ADDR
  arch/s390/include/asm/pgtable.h:#define MODULES_LEN	(1UL << 31)
  arch/s390/kernel/setup.c
	vmax = 1UL << 53;       /* 4-level kernel page table */
        MODULES_END = vmax;
        MODULES_VADDR = MODULES_END - MODULES_LEN;

This patch updates MODULE_ADDR to 0x1FFFFF80000000L for 64bit systems.

Signed-off-by: Jan Stancek <jstancek@redhat.com>