rdma: use print_XXX instead of COLOR_NONE

rdma: use print_XXX instead of COLOR_NONE

The rdma utility should be using same code pattern as rest of
iproute2. When printing, color should only be requested when
desired; if no color wanted, use the simpler print_XXX instead.

Fixes: b0a688a542cd ("rdma: Rewrite custom JSON and prints logic to use common API")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>