fix USB in sleep mode

in sleep mode, USB interrupts were disabled
and USB Device was not working. Sleep mode is default in Mbed-os
e.g. in a call to sleep_for()

Author: JojoS62

targets/TARGET_STM/USBPhy_STM32.cpp

@@ -229,6 +229,14 @@ void USBPhyHw::init(USBPhyEvents *events)
     hpcd.Init.use_external_vbus = DISABLE;
 
     __HAL_RCC_USB_OTG_HS_CLK_ENABLE();
+
+    #ifdef __HAL_RCC_USB1_OTG_FS_ULPI_CLK_SLEEP_DISABLE
+        __HAL_RCC_USB1_OTG_FS_ULPI_CLK_SLEEP_DISABLE();
+    #endif
+    #ifdef __HAL_RCC_USB2_OTG_FS_ULPI_CLK_SLEEP_DISABLE
+        __HAL_RCC_USB2_OTG_FS_ULPI_CLK_SLEEP_DISABLE();
+    #endif
+     
     map = PinMap_USB_HS;
 
 #elif (MBED_CONF_TARGET_USB_SPEED == USE_USB_OTG_FS)
@@ -238,6 +246,14 @@ void USBPhyHw::init(USBPhyEvents *events)
     hpcd.Init.speed = PCD_SPEED_FULL;
 
     __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
+
+    #ifdef __HAL_RCC_USB1_OTG_FS_ULPI_CLK_SLEEP_DISABLE
+        __HAL_RCC_USB1_OTG_FS_ULPI_CLK_SLEEP_DISABLE();
+    #endif
+    #ifdef __HAL_RCC_USB2_OTG_FS_ULPI_CLK_SLEEP_DISABLE
+        __HAL_RCC_USB2_OTG_FS_ULPI_CLK_SLEEP_DISABLE();
+    #endif
+     
     map = PinMap_USB_FS;
 
 #elif (MBED_CONF_TARGET_USB_SPEED == USE_USB_NO_OTG)