Fix for issue #11769 (Cypress: PWM FPGA test wrong assert)

Implementation of pwmout_read() is not consistent with the requirements.
This function should return the current float-point output duty-cycle in range <0.0f, 1.0f>.
Currently it returns decimal percentage value.

targets/TARGET_Cypress/TARGET_PSOC6/cy_pwmout_api.c

@@ -50,7 +50,7 @@ void pwmout_write(pwmout_t *obj, float percent)
 
 float pwmout_read(pwmout_t *obj)
 {
-    return 100.0f * obj->width_us / obj->period_us;
+    return ((float)(obj->width_us) / obj->period_us);
 }
 
 void pwmout_period(pwmout_t *obj, float seconds)