pinctrl: ns2: Fix off by one bugs in ns2_pinmux_enable()

[ Upstream commit 39b65fbb813089e366b376bd8acc300b6fd646dc ]

The pinctrl->functions[] array has pinctrl->num_functions elements and
the pinctrl->groups[] array is the same way.  These are set in
ns2_pinmux_probe().  So the > comparisons should be >= so that we don't
read one element beyond the end of the array.

Fixes: b5aa1006 ("pinctrl: ns2: add pinmux driver support for Broadcom NS2 SoC")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20190926081426.GB2332@mwandaAcked-by: NScott Branden <scott.branden@broadcom.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>

drivers/pinctrl/bcm/pinctrl-ns2-mux.c

@@ -640,8 +640,8 @@ static int ns2_pinmux_enable(struct pinctrl_dev *pctrl_dev,
 	const struct ns2_pin_function *func;
 	const struct ns2_pin_group *grp;
 
-	if (grp_select > pinctrl->num_groups ||
-		func_select > pinctrl->num_functions)
+	if (grp_select >= pinctrl->num_groups ||
+		func_select >= pinctrl->num_functions)
 		return -EINVAL;
 
 	func = &pinctrl->functions[func_select];