soc: bcm: brcmstb: pm: pm-arm: fix typo in comment

Spelling mistake (triple letters) in comment.
Detected with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

drivers/soc/bcm/brcmstb/pm/pm-arm.c

@@ -721,7 +721,7 @@ static int brcmstb_pm_probe(struct platform_device *pdev)
 	ctrl.phy_a_standby_ctrl_offs = ddr_phy_data->phy_a_standby_ctrl_offs;
 	ctrl.phy_b_standby_ctrl_offs = ddr_phy_data->phy_b_standby_ctrl_offs;
 	/*
-	 * Slightly grosss to use the phy ver to get a memc,
+	 * Slightly gross to use the phy ver to get a memc,
 	 * offset but that is the only versioned things so far
 	 * we can test for.
 	 */