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: ad67b74d2469d9b8 ("printk: hash addresses printed with %p")
Signed-off-by: Kees Cook <keescook@chromium.org>
(cherry picked from commit 4f5e838605c264fcf16c3ff9495bd83da99acc6a)
Signed-off-by: Sandeep Patil <sspatil@android.com>

Bug: 4f5e838605c264fcf16c3ff9495bd83da99acc6a
Test: Build and boot cuttlefish
Change-Id: I361837fa62ab77b2299af78d8f806ed42b236203