Documentation: update the CONFIG_DEBUG_PAGEALLOC description
Documentation: update the CONFIG_DEBUG_PAGEALLOC description

The CONFIG_DEBUG_PAGEALLOC option now is located under "Kernel
hacking" / "Memory Debugging" / "Debug page memory allocations".
so we should update the description in kmemcheck.txt.

Signed-off-by: Wang Long <e68b6ff438429ca41648c25d0f54e970cf858504@huawei.com>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs