powerpc/eeh: Export eeh_pe_state_mark()

This exports eeh_pe_state_mark(). It will be used to mark the surprise
hot removed PE as isolated to avoid unexpected EEH error reporting in
surprise remove path.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/eeh_pe.c

@@ -581,6 +581,7 @@ void eeh_pe_state_mark(struct eeh_pe *pe, int state)
 {
 	eeh_pe_traverse(pe, __eeh_pe_state_mark, &state);
 }
+EXPORT_SYMBOL_GPL(eeh_pe_state_mark);
 
 static void *__eeh_pe_dev_mode_mark(void *data, void *flag)
 {