idunn: added ehci-pci to the idunn initramfs

kernels newer than 3.7 or 3.8 need this PCI glue in order to be able
to load a proper USB stack (true for usb-storage and usb-hid).

initramfs/etc_mkinitramfs.d_50-kernel.sh.txt

@@ -3,7 +3,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: target/idunn/initramfs/etc_mkinitramfs.d_50-kernel.sh.txt
-# Copyright (C) 2008 - 2010 The OpenSDE Project
+# Copyright (C) 2008 - 2014 The OpenSDE Project
 #
 # More information can be found in the files COPYING and README.
 #
@@ -38,6 +38,7 @@ else
 
 		# HCI
 		echo {e,o,u}hci-hcd
+		echo ehci-pci
 
 		echo usb-storage
 		echo mptsas