Assign true or false to boolean variables instead of an integer value.

This issue was detected with the help of Coccinelle
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: NMichael Hanselmann <public@hansmi.ch>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>