staging: mt7621-eth: fix spelling mistake: "devictree" -> "devicetree"

Trivial fix to spelling mistake in dev_err message text

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/mt7621-eth/mtk_eth_soc.c

···
 	sysclk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(sysclk)) {
 		dev_err(&pdev->dev,
-			"the clock is not defined in the devictree\n");
+			"the clock is not defined in the devicetree\n");
 		return -ENXIO;
 	}
 	eth->sysclk = clk_get_rate(sysclk);