This is a no-op on x86 but necessarry on ARM and may be necessarry on MIPS.

Add dprintf's on common error paths and remove some entries which are too
noisy.

Found by: Coverity scan.
CID: 96679

Found by: Coverity scan.
CID: 96704

It's disabled by default and has been broken for a long time.
As nobody is interested in fixing and maintaining it, remove it.

Found by: Coverity scan.

This tries to catch all cases where grub_cpu_to_XXX was used for constant
expressions (including sizeof).

	Avoid confusing them with already completed transfers.

	Just "packed" doesn't always pack the way we expect.

	and maybe some other firmwares.

	RTS/CTS flow control.

	type.
	(grub_ehci_fini_hw): Likewise.
	* grub-core/bus/usb/usbhub.c (grub_usb_add_hub): Likewise.

	return grub_usb_err_t for cosistency. All users updated.

	"changed".

	to break endless loop.

	platforms.

	much we can do about it anyway.

	Init err.

	same kind.

	due to delayed attach.

	descriptor to just receive it as argument rather than endpoint
	address.

	grub_print_error.

	zero-out of port structure.

* include/grub/usb.h (grub_usb_iterate_hook_t): New type.
(grub_usb_controller_iterate_hook_t): Likewise.
(grub_usb_iterate): Add hook_data argument.
(grub_usb_controller_iterate): Likewise.
(struct grub_usb_controller_dev.iterate): Likewise.

Update all implementations and callers.

* grub-core/bus/pci.c (grub_pci_iterate): Add hook_data argument,
passed to hook.  Update all callers to pass appropriate hook data.
* grub-core/bus/emu/pci.c (grub_pci_iterate): Likewise.
* include/grub/pci.h (grub_pci_iteratefunc_t): Add data argument.
Remove NESTED_FUNC_ATTR from here and from all users.
(grub_pci_iterate): Update prototype.
* grub-core/bus/cs5536.c (grub_cs5536_find: hook): Make static
instead of nested.  Rename to ...
(grub_cs5536_find_iter): ... this.
* grub-core/kern/efi/mm.c (stop_broadcom: find_card): Likewise.
* grub-core/kern/mips/loongson/init.c (init_pci: set_card):
Likewise.
* grub-core/kern/vga_init.c (grub_qemu_init_cirrus: find_card):
Likewise.
* grub-core/video/bochs.c (grub_video_bochs_setup: find_card):
Likewise.
* grub-core/video/cirrus.c (grub_video_cirrus_setup: find_card):
Likewise.
* grub-core/video/efi_uga.c (find_framebuf: find_card): Likewise.
* grub-core/video/radeon_fuloong2e.c
(grub_video_radeon_fuloong2e_setup: find_card): Likewise.
* grub-core/video/sis315pro.c (grub_video_sis315pro_setup:
find_card): Likewise.
* grub-core/video/sm712.c (grub_video_sm712_setup: find_card):
Likewise.