microblaze: Stop printing the virtual memory layout

For security, don't display the kernel's virtual memory layout.

Kees Cook points out:
"These have been entirely removed on other architectures, so let's
just do the same for ia32 and remove it unconditionally."

071929db ("arm64: Stop printing the virtual memory layout")
1c31d4e9 ("ARM: 8820/1: mm: Stop printing the virtual memory layout")
31833332 ("m68k/mm: Stop printing the virtual memory layout")
fd8d0ca2 ("parisc: Hide virtual kernel memory layout")
adb1fe9a ("mm/page_alloc: Remove kernel address exposure in free_reserved_area()")

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Acked-by: Tycho Andersen <tycho@tycho.ws>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>