ionic: remove intr coalesce update from napi

ionic: remove intr coalesce update from napi

BugLink: https://bugs.launchpad.net/bugs/1940706
[ Upstream commit a6ff85e0a2d9d074a4b4c291ba9ec1e5b0aba22b ]

Move the interrupt coalesce value update out of the napi
thread and into the dim_work thread and set it only when it
has actually changed.

Fixes: 04a834592bf5 ("ionic: dynamic interrupt moderation")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>