net: ena: Extract recurring driver reset code into a function

[ Upstream commit 9fe890cc ]

Create an inline function for resetting the driver
to reduce code duplication.

Signed-off-by: Nati Koler <nkoler@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: 2dc8b1e7 ("net: ena: Fix redundant device NUMA node override")
Signed-off-by: Sasha Levin <sashal@kernel.org>