usb: ehci: Be explicit about the BE IO accessors

Add explicit cpu_to_be32()/be32_to_cpu() conversion to BE EHCI I/O
accessors to align them with their LE counterpart. No functional
change.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index b41c04a..826b3fe 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -102,8 +102,9 @@
 } __attribute__ ((packed));
 
 #if defined CONFIG_EHCI_DESC_BIG_ENDIAN
-#define	ehci_readl(x)		(*((volatile u32 *)(x)))
-#define ehci_writel(a, b)	(*((volatile u32 *)(a)) = ((volatile u32)b))
+#define ehci_readl(x)		cpu_to_be32((*((volatile u32 *)(x))))
+#define ehci_writel(a, b)	(*((volatile u32 *)(a)) = \
+					cpu_to_be32(((volatile u32)b)))
 #else
 #define ehci_readl(x)		cpu_to_le32((*((volatile u32 *)(x))))
 #define ehci_writel(a, b)	(*((volatile u32 *)(a)) = \