arm: omap: musb: ioremap only what's ours

omap3430 TRM says the OTG address space is 4k, not 8k.

Cc: linux-usb@vger.kernel.org
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/usb-musb.c

@@ -152,7 +152,7 @@ void __init usb_musb_init(void)
 		musb_resources[0].start = OMAP243X_HS_BASE;
 	else
 		musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
-	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
+	musb_resources[0].end = musb_resources[0].start + SZ_4K - 1;
 
 	/*
 	 * REVISIT: This line can be removed once all the platforms using