[patch] i40e: fix an uninitialized variable bug

[Dan Carpenter]

We removed this initialization but it is required.  Let's put it back.

Fixes: 895106a577c4 ('i40e: trivial fixes')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_hmc.c 
b/drivers/net/ethernet/intel/i40e/i40e_hmc.c
index 5ebe12d..a7c7b1d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_hmc.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_hmc.c
@@ -49,7 +49,7 @@ i40e_status i40e_add_sd_table_entry(struct i40e_hw *hw,
        struct i40e_hmc_sd_entry *sd_entry;
        bool dma_mem_alloc_done = false;
        struct i40e_dma_mem mem;
-       i40e_status ret_code;
+       i40e_status ret_code = I40E_SUCCESS;
        u64 alloc_len;
 
        if (NULL == hmc_info->sd_table.sd_entry) {