EDAC, skx_common: Refactor so that we initialize "dev" in result of adxl decode.

[ Upstream commit 29b8e84fbc23cb2b70317b745641ea0569426872 ]

Simplifies the code a little.

Acked-by: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Stable-dep-of: 123b15863550 ("EDAC, i10nm: make skx_common.o a separate module")
Signed-off-by: Sasha Levin <sashal@kernel.org>