KVM: Tidy the whitespace in nested_svm_check_permissions()

I moved the || to the line before.  Also I replaced some spaces with a
tab on the "return 0;" line.  It looks OK in the diff but originally
that line was only indented 7 spaces.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>