boards/common/stm32: rename cfg_usb_otg_hs_fs.h to clarify the usage

The `fs` in the file name means that on-chip FS PHY is configured for USB OTG HS. The file is renamed to `cfg_usb_otg_hs_phy_fs.h`
- to clarify that USB OTG HS is just configured with PHY FS and not HS and FS,
- to allow a configuration of USB OTG FS and HS in one file called `cfg_usb_otg_hs_fs.h` or whatever, and
- to allow a configuration of USB OTG HS with ULPI PHY in a file called `cfg_usb_otg_hs_phy_ulpi.h`.
f

boards/common/stm32/include/cfg_usb_otg_hs_phy_fs.h

@@ -11,13 +11,17 @@
  * @{
  *
  * @file
- * @brief       Common configuration for STM32 OTG HS peripheral with FS phy
+ * @brief       Common configuration for STM32 OTG HS peripheral with on-chip FS PHY
+ *
+ * All STM32 boards which use the on-chip FS PHY for the USB OTG HS peripheral
+ * use the same configuration. Therefore a common configuration file can be
+ * used for these boards.
  *
  * @author      Koen Zandberg <koen@bergzand.net>
  */
 
-#ifndef CFG_USB_OTG_HS_FS_H
-#define CFG_USB_OTG_HS_FS_H
+#ifndef CFG_USB_OTG_HS_PHY_FS_H
+#define CFG_USB_OTG_HS_PHY_FS_H
 
 #include "periph_cpu.h"
 #include "usbdev_synopsys_dwc2.h"
@@ -57,5 +61,5 @@ static const dwc2_usb_otg_fshs_config_t dwc2_usb_otg_fshs_config[] = {
 }
 #endif
 
-#endif /* CFG_USB_OTG_HS_FS_H */
+#endif /* CFG_USB_OTG_HS_PHY_FS_H */
 /** @} */

boards/stm32f429i-disc1/include/periph_conf.h

@@ -32,7 +32,7 @@
 #include "periph_cpu.h"
 #include "clk_conf.h"
 #include "cfg_timer_tim5.h"
-#include "cfg_usb_otg_hs_fs.h"
+#include "cfg_usb_otg_hs_phy_fs.h"
 
 #ifdef __cplusplus
 extern "C" {