UPSTREAM: usercopy: Remove pointer from overflow report

Using %p was already mostly useless in the usercopy overflow reports,
so this removes it entirely to avoid confusion now that %p-hashing
is enabled.

Fixes: ad67b74d ("printk: hash addresses printed with %p")
Signed-off-by: Kees Cook <keescook@chromium.org>
(cherry picked from commit 4f5e8386)
Signed-off-by: Sandeep Patil <sspatil@android.com>

Bug: 78533979
Test: Build and boot cuttlefish
Change-Id: I6818c6a678844f174f4ac7ca08b945ec7ce229d5