drivers/net/tulip: fix sparse warning: symbol shadows an earlier one

Impact: Rename a local variable resp. remove a redundant variable and
while being at it use more unform loop constructs.

Fix this sparse warning:
  drivers/net/tulip/de4x5.c:3944:13: warning: symbol 'i' shadows an earlier one
  drivers/net/tulip/de4x5.c:3938:9: originally declared here
  drivers/net/tulip/media.c:72:21: warning: symbol 'i' shadows an earlier one
  drivers/net/tulip/media.c:54:13: originally declared here
  drivers/net/tulip/media.c:134:21: warning: symbol 'i' shadows an earlier one
  drivers/net/tulip/media.c:117:13: originally declared here

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tulip/de4x5.c b/drivers/net/tulip/de4x5.c
index 98e8682..6430a2e 100644
--- a/drivers/net/tulip/de4x5.c
+++ b/drivers/net/tulip/de4x5.c
@@ -3942,8 +3942,8 @@
 	strcpy(name, "DE434/5");
 	return status;
     } else {                           /* Search for a DEC name in the SROM */
-	int i = *((char *)&lp->srom + 19) * 3;
-	strncpy(name, (char *)&lp->srom + 26 + i, 8);
+	int tmp = *((char *)&lp->srom + 19) * 3;
+	strncpy(name, (char *)&lp->srom + 26 + tmp, 8);
     }
     name[8] = '\0';
     for (i=0; i<siglen; i++) {