drivers: gpio: fix SN74HC595 reset GPIO prop name

The reset GPIO for the SN74HC595 driver was not working anymore since
c407fbc. That commit made it optional among other changes but
accidently removed the s from reset_gpios property name causing the
driver not being able to retrieve the specified reset-gpios property
from the devicetree anymore. Add the missing s back to fix this.

Signed-off-by: Michael Klammt <michael.klammt@automatic-research.de>

Author: klammtm

drivers/gpio/gpio_sn74hc595.c

@@ -226,7 +226,7 @@ static int gpio_sn74hc595_init(const struct device *dev)
 				.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n),               \
 			},                                                                         \
 		.bus = SPI_DT_SPEC_INST_GET(n, SN74HC595_SPI_OPERATION),                           \
-		.reset_gpio = GPIO_DT_SPEC_INST_GET_OR(n, reset_gpio, {0}),                        \
+		.reset_gpio = GPIO_DT_SPEC_INST_GET_OR(n, reset_gpios, {0}),                       \
 		.enable_gpio = GPIO_DT_SPEC_INST_GET_OR(n, enable_gpios, {0}),                     \
 		.num_registers = DT_INST_PROP(n, ngpios) / BITS_PER_BYTE,                          \
 	};                                                                                         \