Documentation: PM: Drop pme_interrupt reference

`pme_interrupt` was dropped from `struct pci_dev` as part of commit
8370c2dc ("PCI / PM: Drop pme_interrupt flag from struct pci_dev"),
but the Documentation still includes this member.

Remove it from the documentation as well and update it to have the missing
`pme_poll` member instead.

Fixes: 8370c2dc ("PCI / PM: Drop pme_interrupt flag from struct pci_dev")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Documentation/power/pci.rst

@@ -315,7 +315,7 @@ that these callbacks operate on::
 					   configuration space */
 	unsigned int	pme_support:5;	/* Bitmask of states from which PME#
 					   can be generated */
-	unsigned int	pme_interrupt:1;/* Is native PCIe PME signaling used? */
+	unsigned int	pme_poll:1;	/* Poll device's PME status bit */
 	unsigned int	d1_support:1;	/* Low power state D1 is supported */
 	unsigned int	d2_support:1;	/* Low power state D2 is supported */
 	unsigned int	no_d1d2:1;	/* D1 and D2 are forbidden */