[SCSI] lpfc: lower stack use in lpfc_fc_frame_check

according to checkstack the lpfc_fc_frame_check occupies the first
place in stack usage:

make checkstack
objdump -d vmlinux $(find . -name '*.ko') | \
perl /root/rpmbuild/BUILD/kernel-2.6.32/linux-2.6.32.x86_64/scripts/checkstack.pl x86_64
0x000013f4 lpfc_fc_frame_check [lpfc]: 1936
...
This change makes the rctl_names static, thus not on stack.

Signed-off-by: Tomas Henzl <[e-mail]>
Acked-by: James Smart <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/lpfc/lpfc_sli.c

···
 static int
 lpfc_fc_frame_check(struct lpfc_hba *phba, struct fc_frame_header *fc_hdr)
 {
-	char *rctl_names[] = FC_RCTL_NAMES_INIT;
+	/*  make rctl_names static to save stack space */
+	static char *rctl_names[] = FC_RCTL_NAMES_INIT;
 	char *type_names[] = FC_TYPE_NAMES_INIT;
 	struct fc_vft_header *fc_vft_hdr;