usb: Rename ehci-fsl.h to ehci-ci.h

Most of ehci-fsl header describe USB controller
designed by Chipidea and used by various SoC vendors.

This patch renames it to a generic header: ehci-ci.h
Contents of file are not changed (so it contains several
references to freescale SoCs).

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/board/boundary/nitrogen6x/nitrogen6x.c b/board/boundary/nitrogen6x/nitrogen6x.c
index 104d71f..a3a56ca 100644
--- a/board/boundary/nitrogen6x/nitrogen6x.c
+++ b/board/boundary/nitrogen6x/nitrogen6x.c
@@ -31,7 +31,7 @@
 #include <i2c.h>
 #include <input.h>
 #include <netdev.h>
-#include <usb/ehci-fsl.h>
+#include <usb/ehci-ci.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 #define GP_USB_OTG_PWR	IMX_GPIO_NR(3, 22)