powerpc/eeh_sysfs: Fix incorrect comment

The EEH_ATTR_SHOW() helper is used to display fields from struct eeh_dev
not struct pci_dn.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190715085612.8802-3-oohall@gmail.com

arch/powerpc/kernel/eeh_sysfs.c

@@ -14,7 +14,7 @@
 /**
  * EEH_SHOW_ATTR -- Create sysfs entry for eeh statistic
  * @_name: name of file in sysfs directory
- * @_memb: name of member in struct pci_dn to access
+ * @_memb: name of member in struct eeh_dev to access
  * @_format: printf format for display
  *
  * All of the attributes look very similar, so just