[nrf fromlist] drivers: pwm: pwm_nrf_sw: fix gpiote reference

GPIOTE instance should be accessed via pointer.

Upstream PR #: 98527

Signed-off-by: Nikodem Kastelik <[email protected]>

Author: nika-nordic

drivers/pwm/pwm_nrf_sw.c

@@ -350,7 +350,7 @@ static int pwm_nrf_sw_init(const struct device *dev)
 	uint32_t src_d = nrfx_gppi_domain_id_get((USE_RTC ? (uint32_t)rtc : (uint32_t)timer));
 
 	for (uint32_t i = 0; i < config->map_size; i++) {
-		uint32_t dst_d = nrfx_gppi_domain_id_get((uint32_t)config->gpiote[i].p_reg);
+		uint32_t dst_d = nrfx_gppi_domain_id_get((uint32_t)config->gpiote[i]->p_reg);
 		int rv;
 
 		/* Allocate resources. */