powerpc/eeh: Cleanup eeh_pe_state_mark()

Currently, eeh_pe_state_mark() marks a PE (and it's children) with a
state and then performs additional processing if that state included
EEH_PE_ISOLATED.

The state parameter is always a constant at the call site, so
rearrange eeh_pe_state_mark() into two functions and just call the
appropriate one at each site.

Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

drivers/pci/hotplug/pnv_php.c

@@ -736,7 +736,7 @@ static irqreturn_t pnv_php_interrupt(int irq, void *data)
 		pe = edev ? edev->pe : NULL;
 		if (pe) {
 			eeh_serialize_lock(&flags);
-			eeh_pe_state_mark(pe, EEH_PE_ISOLATED);
+			eeh_pe_mark_isolated(pe);
 			eeh_serialize_unlock(flags);
 			eeh_pe_set_option(pe, EEH_OPT_FREEZE_PE);
 		}