EHCI support. All of the credit goes to Aleš Nesrsta. I've just added

	the support for the CS5536 modification thereos and few bugfixes.

	* grub-core/Makefile.core.def (ehci): New module.
	* grub-core/bus/usb/ehci.c: New file.
	* grub-core/bus/usb/usbhub.c (grub_usb_hub_add_dev): New arguments
	port and hubaddr. All users updated.
	Save port and hubaddr into dev structure.
	* include/grub/cs5536.h (GRUB_CS5536_MSR_USB_BASE_SMI_ENABLE): New
	define.
	* include/grub/pci.h (grub_dma_phys2virt): New function.
	(grub_dma_virt2phys): Likewise.
	* include/grub/usb.h (grub_usb_device): New members port and hubaddr.

diff --cc ChangeLog
index d0c36a5350d9752f5e5730f10e65546b31e8d9b1,d0c36a5350d9752f5e5730f10e65546b31e8d9b1..0f52d3fbc1fcbfc10bc5841c5e7c7b58f49589bb
--- 1/ChangeLog
--- 2/ChangeLog
+++ b/ChangeLog
@@@ -1,3 -1,3 +1,20 @@@
++2012-02-01  Aleš Nesrsta <starous@volny.cz>
++2012-02-01  Vladimir Serbinenko  <phcoder@gmail.com>
++
++      EHCI support. All of the credit goes to Aleš Nesrsta. I've just added
++      the support for the CS5536 modification thereos and few bugfixes.
++
++      * grub-core/Makefile.core.def (ehci): New module.
++      * grub-core/bus/usb/ehci.c: New file.
++      * grub-core/bus/usb/usbhub.c (grub_usb_hub_add_dev): New arguments
++      port and hubaddr. All users updated.
++      Save port and hubaddr into dev structure.
++      * include/grub/cs5536.h (GRUB_CS5536_MSR_USB_BASE_SMI_ENABLE): New
++      define.
++      * include/grub/pci.h (grub_dma_phys2virt): New function.
++      (grub_dma_virt2phys): Likewise.
++      * include/grub/usb.h (grub_usb_device): New members port and hubaddr.
++
  2012-01-31  Vladimir Serbinenko  <phcoder@gmail.com>
  
        * grub-core/fs/fat.c (grub_fat_mount) [!MODE_EXFAT]: Remove fstype