RDMA/bnxt_re: Add a debugfs entry for CQE coalescing tuning

RDMA/bnxt_re: Add a debugfs entry for CQE coalescing tuning

This patch adds debugfs interfaces that allows the user to
enable/disable the RoCE CQ coalescing and fine tune certain
CQ coalescing parameters which would be helpful during debug.

Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Reviewed-by: Hongguang Gao <hongguang.gao@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20251103043425.234846-1-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>