MdeModulePkg/AtaBusDxe: remove a redundant error check

Signed-off-by: Tian Feng <feng.tian@intel.com>
Reviewed-by: Li Elvin <elvin.li@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13902 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Bus/Ata/AtaBusDxe/AtaPassThruExecute.c

@@ -433,10 +433,8 @@ DiscoverAtaDevice (
       // The command is issued successfully
       //
       Status = IdentifyAtaDevice (AtaDevice);
-      if (!EFI_ERROR (Status)) {
       return Status;
     }
-    }
   } while (Retry-- > 0);
 
   return Status;