mxs: Squash the header file usage in ehci-mxs

The ehci-mxs driver included the register definitions directly.
Use imx-regs.h instead since it contains proper handling of the
differences between mx23 and mx28.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Otavio Salvador <otavio@ossystems.com.br>

arch/arm/include/asm/arch-mxs/imx-regs.h

@@ -36,6 +36,8 @@
 #include <asm/arch/regs-rtc.h>
 #include <asm/arch/regs-ssp.h>
 #include <asm/arch/regs-timrot.h>
+#include <asm/arch/regs-usb.h>
+#include <asm/arch/regs-usbphy.h>
 
 #ifdef CONFIG_MX23
 #include <asm/arch/regs-clkctrl-mx23.h>

drivers/usb/host/ehci-mxs.c

@@ -21,11 +21,7 @@
 
 #include <common.h>
 #include <asm/io.h>
-#include <asm/arch/regs-common.h>
-#include <asm/arch/regs-base.h>
-#include <asm/arch/regs-clkctrl-mx28.h>
-#include <asm/arch/regs-usb.h>
-#include <asm/arch/regs-usbphy.h>
+#include <asm/arch/imx-regs.h>
 
 #include "ehci.h"