[PATCH] fc: fix fpin_els build breakage

[James Smart <jsmart2021@gmail.com>]

Kbuild reported the following error:

All error/warnings (new ones prefixed by >>):

   In file included from <command-line>:32:0:
   ./usr/include/scsi/fc/fc_els.h: In function 'fc_tlv_next_desc':
>> ./usr/include/scsi/fc/fc_els.h:274:4: error: implicit declaration of
    function 'be32_to_cpu'; did you mean '__be32_to_cpu'?
    [-Werror=implicit-function-declaration]
      (be32_to_cpu((tlv)->desc_len) + FC_TLV_DESC_HDR_SZ)
       ^
>> ./usr/include/scsi/fc/fc_els.h:286:17: note: in expansion of macro
    'FC_TLV_DESC_SZ_FROM_LENGTH'
     return (desc + FC_TLV_DESC_SZ_FROM_LENGTH(tlv));
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

Fix by converting fc_tlv_next_desc to use __be32_to_cpu().

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reported-by: kbuild test robot <lkp@intel.com>
---
 include/uapi/scsi/fc/fc_els.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/scsi/fc/fc_els.h b/include/uapi/scsi/fc/fc_els.h
index 10b609a2f863..66318c44acd7 100644
--- a/include/uapi/scsi/fc/fc_els.h
+++ b/include/uapi/scsi/fc/fc_els.h
@@ -271,7 +271,7 @@ struct fc_tlv_desc {
 
 /* Macro, used on received payloads, to return the descriptor length */
 #define FC_TLV_DESC_SZ_FROM_LENGTH(tlv)		\
-		(be32_to_cpu((tlv)->desc_len) + FC_TLV_DESC_HDR_SZ)
+		(__be32_to_cpu((tlv)->desc_len) + FC_TLV_DESC_HDR_SZ)
 
 /*
  * This helper is used to walk descriptors in a descriptor list.
-- 
2.13.7