scsi: lpfc: fix build error of lpfc_debugfs.c for vfree/vmalloc

lpfc_debufs.c was missing include of vmalloc.h when compiled on PPC.

Add missing header.

Link: https://lore.kernel.org/r/20191025182530.26653-1-jsmart2021@gmail.com


Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>