docs(swan_r5): misc comments/formatting

ports/stm/peripherals/stm32l4/stm32l4r5xx/gpio.c

@@ -37,6 +37,10 @@ void stm32_peripherals_gpio_init(void) {
     __HAL_RCC_GPIOF_CLK_ENABLE();
     __HAL_RCC_GPIOG_CLK_ENABLE();
 
+    // These ports are not used on the Swan R5 but may need to be enabeld on other boards
+    //__HAL_RCC_GPIOH_CLK_ENABLE();
+    //__HAL_RCC_GPIOI_CLK_ENABLE();
+
     // Never reset pins
     never_reset_pin_number(2,14); // PC14 OSC32_IN
     never_reset_pin_number(2,15); // PC15 OSC32_OUT

ports/stm/supervisor/internal_flash.c

@@ -332,7 +332,7 @@ mp_uint_t supervisor_flash_write_blocks(const uint8_t *src, uint32_t block_num,
             return false;
         }
 
-        // unlock flash - // mdm why? the flash is only locked again
+        // unlock flash
         HAL_FLASH_Unlock();
 
         uint32_t sector_size;

shared-module/usb_cdc/__init__.c

@@ -415,4 +415,4 @@ size_t usb_vendor_add_descriptor(uint8_t *descriptor_buf, descriptor_counts_t *d
 
 
 
-#endif
+#endif