usb: s3c-otg: Rename regs-otg.h to s3c_udc_otg_regs.h

Rename the header file, so it's obvious which driver it's part of.
No functional change.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/gadget/s3c_udc_otg_phy.c b/drivers/usb/gadget/s3c_udc_otg_phy.c
index f13cb89..963b617 100644
--- a/drivers/usb/gadget/s3c_udc_otg_phy.c
+++ b/drivers/usb/gadget/s3c_udc_otg_phy.c
@@ -32,7 +32,7 @@
 
 #include <asm/mach-types.h>
 
-#include "regs-otg.h"
+#include "s3c_udc_otg_regs.h"
 #include <usb/lin_gadget_compat.h>
 
 #include <usb/s3c_udc.h>