drivers: counter: Fix redundant identical condition

There was an unnecessary nested `if` in `ifx_cat1_counter_init` with the
same condition already checked in the outer block.

This results in dead and redundant code with no functional impact but
harms readability.

The inner `if (rslt != CY_RSLT_SUCCESS)` was removed to clean up the
function.

Signed-off-by: Gaetan Perrot <gaetan.perrot@spacecubics.com>

drivers/counter/counter_ifx_cat1.c

@@ -188,12 +188,10 @@ static int ifx_cat1_counter_init(const struct device *dev)
 
 		rslt = cyhal_gpio_enable_output(config->external_pin, CYHAL_SIGNAL_TYPE_EDGE,
 						(cyhal_source_t *)&data->signal_source);
-		if (rslt != CY_RSLT_SUCCESS) {
 		if (rslt != CY_RSLT_SUCCESS) {
 			LOG_ERR("error in the enabling of Counter input pin output");
 			return -EIO;
 		}
-		}
 
 		rslt = cyhal_timer_connect_digital(&data->counter_obj, data->signal_source,
 						   CYHAL_TIMER_INPUT_COUNT);