Revert "rtc: dt-binding: abx80x: fix resistance scale"

This reverts commit 0281b46b.

This is a preparation change for merging android-4.19-q.89 into
msm-4.19 branch.

[1] is conflicting against [2] in msm-4.19.

[1] 0281b46b("rtc: dt-binding: abx80x: fix resistance scale")
[2] 728aba9a("Documentation: devicetree: Remove devicetree bindings from kernel")

Change-Id: I12113d36ab62b58f6a3703201bb28dd7015715c9
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>