new_log2_pages may increase 2 when try_resplit
new_log2_pages may increase 2
when try_resplit

Signed-off-by: dongjuan <1b774497373669e00e0aec18f4d97e19aaab3049@zte.com.cn>
Change-Id: I3ebbe7d2d11453700503df7f3be549781d8b73a7

FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp