ulp: fix calculation or ulp_run argument

The argument to ulp_run should be expressed in 32-bit words. Both the
address of ulp_entry and RTC_SLOW_MEM already are uint32_t*, so their
difference is the difference in addresses divided by sizeof(uint32_t).
Therefore the extra division by sizeof(uint32_t) is not needed.

examples/system/ulp_adc/main/ulp_adc_example_main.c

@@ -89,6 +89,6 @@ static void start_ulp_program()
     ulp_sample_counter = 0;
 
     /* Start the program */
-    esp_err_t err = ulp_run((&ulp_entry - RTC_SLOW_MEM) / sizeof(uint32_t));
+    esp_err_t err = ulp_run(&ulp_entry - RTC_SLOW_MEM);
     ESP_ERROR_CHECK(err);
 }