clk: apn806: fix spelling mistake: "mising" -> "missing"

trivial fix to spelling mistake in dev_warn message
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/clk/mvebu/ap806-system-controller.c

@@ -140,7 +140,7 @@ static int ap806_syscon_clk_probe(struct platform_device *pdev)
 					  4, &name)) {
 		ap806_clk_data.clk_num--;
 		dev_warn(&pdev->dev,
-			 "eMMC clock mising: update the device tree!\n");
+			 "eMMC clock missing: update the device tree!\n");
 	} else {
 		ap806_clks[4] = clk_register_fixed_factor(NULL, name,
 							  fixedclk_name,