BACKPORT: docs: correct documentation for %pK

Current documentation indicates that %pK prints a leading '0x'. This is
not the case.

Correct documentation for printk specifier %pK.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
(cherry picked from commit 553d8e8b107159088cc4e2855a2bd9a358365e3f)
Signed-off-by: Sandeep Patil <sspatil@android.com>

Bug: 78533979
Test: Builds
Change-Id: I69439ea6aca65d209c43b4cc54ead7d2df9af5c1
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt
index d2fbeeb..56505ea 100644
--- a/Documentation/printk-formats.txt
+++ b/Documentation/printk-formats.txt
@@ -58,7 +58,7 @@
 
 Kernel Pointers:
 
-	%pK	0x01234567 or 0x0123456789abcdef
+	%pK	01234567 or 0123456789abcdef
 
 	For printing kernel pointers which should be hidden from unprivileged
 	users. The behaviour of %pK depends on the kptr_restrict sysctl - see