scsi: bfa: Staticify non-external functions

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/bfa/bfa_ioc.c:5023:1: warning: no previous prototype for ‘bfa_diag_intr’ [-Wmissing-prototypes]
 5023 | bfa_diag_intr(void *diagarg, struct bfi_mbmsg_s *msg)
 | ^~~~~~~~~~~~~
 drivers/scsi/bfa/bfa_ioc.c:6966:1: warning: no previous prototype for ‘bfa_flash_sem_get’ [-Wmissing-prototypes]
 6966 | bfa_flash_sem_get(void __iomem *bar)
 | ^~~~~~~~~~~~~~~~~
 drivers/scsi/bfa/bfa_ioc.c:6979:1: warning: no previous prototype for ‘bfa_flash_sem_put’ [-Wmissing-prototypes]
 6979 | bfa_flash_sem_put(void __iomem *bar)
 | ^~~~~~~~~~~~~~~~~

Link: https://lore.kernel.org/r/20200723122446.1329773-24-lee.jones@linaro.org
Cc: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
Cc: Sudarsana Kalluru <sudarsana.kalluru@qlogic.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/bfa/bfa_ioc.c

@@ -5019,7 +5019,7 @@ diag_portbeacon_comp(struct bfa_diag_s *diag)
 /*
  *	Diag hmbox handler
  */
-void
+static void
 bfa_diag_intr(void *diagarg, struct bfi_mbmsg_s *msg)
 {
 	struct bfa_diag_s *diag = diagarg;
@@ -6962,7 +6962,7 @@ bfa_raw_sem_get(void __iomem *bar)
 
 }
 
-bfa_status_t
+static bfa_status_t
 bfa_flash_sem_get(void __iomem *bar)
 {
 	u32 n = FLASH_BLOCKING_OP_MAX;
@@ -6975,7 +6975,7 @@ bfa_flash_sem_get(void __iomem *bar)
 	return BFA_STATUS_OK;
 }
 
-void
+static void
 bfa_flash_sem_put(void __iomem *bar)
 {
 	writel(0, (bar + FLASH_SEM_LOCK_REG));