Revert "drm/probe-helpers: Drop locking from poll_enable"

This reverts commit 3846fd9b86001bea171943cc3bb9222cb6da6b42.

There were some precursor commits missing for this around connector
locking, we should probably merge Lyude's nouveau avoid the problem patch.

path: root/tools/build/feature/test-hello.c

#include <stdio.h>

int main(void)
{
	return puts("hi");
}