linux-yocto/5.19: fix elfutils run-backtrace-native-core ptest failure

The following commit was integrated into the 5.19.15 -stable series and
breaks the elfutils backtrace ptests.

 don't use __kernel_write() on kmap_local_page()

It could be that other commits are also required in -stable, but a
revert is the easiest way to deal with the regression. We can revisit
newer kernel's (where the commit is also present) if they also start
to fail the test.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>