pinctrl: ocelot: remove redundant assignment to variable ret

The variable ret is being assigned a value that is never read, it
is being re-assigned a value in every case statement in the following
switch statement. The assignment is redundant and can be removed.

Cleans up clang scan build warning:
drivers/pinctrl/pinctrl-ocelot.c:1404:3: warning: Value stored to 'ret'
is never read [deadcode.DeadStores]
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20240223162850.3914349-1-colin.i.king@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-ocelot.c

@@ -1401,7 +1401,6 @@ static int ocelot_hw_set_value(struct ocelot_pinctrl *info,
 	if (info->pincfg) {
 		const struct ocelot_pincfg_data *opd = info->pincfg_data;
 
-		ret = 0;
 		switch (reg) {
 		case PINCONF_BIAS:
 			ret = ocelot_pincfg_clrsetbits(info, pin,