pinctrl: tangier: Move default strength assignment to a switch-case

iWhen ->pin_config_set() is called from the GPIO library (assumed
GpioIo() ACPI resource), the argument can be 1, when, for example,
PullDefault is provided. In such case we supply sane default in
the driver. Move that default assingment to a switch-case, so
it will be consolidated in one place.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/pinctrl/intel/pinctrl-tangier.c

@@ -368,14 +368,11 @@ static int tng_config_set_pin(struct tng_pinctrl *tp, unsigned int pin,
 		break;
 
 	case PIN_CONFIG_BIAS_PULL_UP:
-		/* Set default strength value in case none is given */
-		if (arg == 1)
-			arg = 20000;
-
 		switch (arg) {
 		case 50000:
 			term = BUFCFG_PUPD_VAL_50K;
 			break;
+		case 1: /* Set default strength value in case none is given */
 		case 20000:
 			term = BUFCFG_PUPD_VAL_20K;
 			break;
@@ -394,14 +391,11 @@ static int tng_config_set_pin(struct tng_pinctrl *tp, unsigned int pin,
 		break;
 
 	case PIN_CONFIG_BIAS_PULL_DOWN:
-		/* Set default strength value in case none is given */
-		if (arg == 1)
-			arg = 20000;
-
 		switch (arg) {
 		case 50000:
 			term = BUFCFG_PUPD_VAL_50K;
 			break;
+		case 1: /* Set default strength value in case none is given */
 		case 20000:
 			term = BUFCFG_PUPD_VAL_20K;
 			break;