Revert "arm: fix show_data fallout from KERN_CONT changes"

This reverts commit 40a18300.

This change fixes a bug in show_data(), which we are about to remove.

Bug: 124903482
Change-Id: Ia3f091599ff57183ac4245add296e6b51b728059
Signed-off-by: Alistair Strachan <astrachan@google.com>