ag71xx: fix SGMII invalid fixup execution

Above this code section, follow comment is present:

* Across resets SGMII link status goes to weird state.
* If SGMII_DEBUG register reads other than 0x1f or 0x10,
* we are for sure in a bad  state.

Fix the loop check to we actually check for these 2 values.

Currently this results in the devices being resetted 20 times
and giving up printing an error .. while it still works nicely afterwards.

Signed-off-by: Koen Vandeputte <[email protected]>

target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c

@@ -731,7 +731,7 @@ static void ag71xx_sgmii_init_qca955x(struct device_node *np)
 			pr_err("ag71xx: max retries for SGMII fixup exceeded\n");
 			break;
 		}
-	} while (!(sgmii_status == 0xf || sgmii_status == 0x10));
+	} while (!(sgmii_status == 0x1f || sgmii_status == 0x10));
 
 sgmii_out:
 	iounmap(gmac_base);