Revert "memory: fsl_ifc: fix leak of IO mapping on probe failure"

This reverts commit b7a2bcb4 which is
commit 3b132ab67fc7a358fff35e808fa65d4bea452521 upstream.

As reported, it breaks the build, the 'gregs' field is not in the 4.4.y
kernel tree.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210721144845.GA3445926@roeck-us.net


Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>