s390/dump: fix os_info virtual vs physical address confusion

s390/dump: fix os_info virtual vs physical address confusion

[ Upstream commit 1e40fc2a1c38c88e68858c2e9194cfc3e397814b ]

Due to historical reasons os_info handling functions misuse
the notion of physical vs virtual addresses difference.

Note: this does not fix a bug currently, since virtual
and physical addresses are identical.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>