rtl8xxxu: Don't check for illegal offset when reading from efuse

It is enough to check for either illegal offset or illegal map address
because map address is a value derived from an offset:

  map_addr = offset * 8
  EFUSE_MAP_LEN = EFUSE_MAX_SECTION_8723A * 8

Leave just the check for an illegal map address because its upper
bound (EFUSE_MAP_LEN) is used also in a couple other places.
Signed-off-by: Jakub Sitnicki <jsitnicki@gmail.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c

@@ -2417,6 +2417,8 @@ static int rtl8xxxu_read_efuse(struct rtl8xxxu_priv *priv)
 
 	efuse_addr = 0;
 	while (efuse_addr < EFUSE_REAL_CONTENT_LEN_8723A) {
+		u16 map_addr;
+
 		ret = rtl8xxxu_read_efuse8(priv, efuse_addr++, &header);
 		if (ret || header == 0xff)
 			goto exit;
@@ -2439,8 +2441,6 @@ static int rtl8xxxu_read_efuse(struct rtl8xxxu_priv *priv)
 			word_mask = header & 0x0f;
 		}
 
-		if (offset < EFUSE_MAX_SECTION_8723A) {
-			u16 map_addr;
 		/* Get word enable value from PG header */
 
 		/* We have 8 bits to indicate validity */
@@ -2471,13 +2471,6 @@ static int rtl8xxxu_read_efuse(struct rtl8xxxu_priv *priv)
 			} else
 				map_addr += 2;
 		}
-		} else {
-			dev_warn(dev,
-				 "%s: Illegal offset (%04x), efuse corrupt!\n",
-				 __func__, offset);
-			ret = -EINVAL;
-			goto exit;
-		}
 	}
 
 exit: