PC, KVM, CMA: Fix regression caused by wrong get_order() use
PC, KVM, CMA: Fix regression caused by wrong get_order() use

fc95ca7284bc54953165cba76c3228bd2cdb9591 claims that there is no
functional change but this is not true as it calls get_order() (which
takes bytes) where it should have called order_base_2() and the kernel
stops on VM_BUG_ON().

This replaces get_order() with order_base_2() (round-up version of ilog2).

Suggested-by: Paul Mackerras <19a0ba370c443ba08d20b5061586430ab449ee8c@samba.org>
Cc: Alexander Graf <3ad82b0c937b9aa51276120cedd545efc822be04@suse.de>
Cc: Joonsoo Kim <bb6c8cfe7699e0f11d1bee88022eb563a5f8e881@lge.com>
Cc: Benjamin Herrenschmidt <a7089bb6e7e92505d88aaff006cbdd60cc9120b6@kernel.crashing.org>
Reviewed-by: Aneesh Kumar K.V <f511f818e8a0748edef6b9ee378967da9ed0c78f@linux.vnet.ibm.com>
Signed-off-by: Alexey Kardashevskiy <ac1fc56530d7d037e1ea666f130daca22d72f964@ozlabs.ru>
Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs