efi: use objcopy with CROSS_COMPILE prefix ...

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

EFI: add missing include ...

Otherwise building produces these warnings:
[...]
arch/efi/efi/efi-image.c:48:2: warning: implicit declaration of function 'read_file' [-Wimplicit-function-declaration]
arch/efi/efi/efi-image.c:48:6: warning: assignment makes pointer from integer without a cast [enabled by default]
[...]

And bootm fails for x86_64. The implicit declaration has an int as return
value, so half of the returned address is lost.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

EFI: fix error handling in efi_get_boot() ...

efi_get_global_var() returns an error code, not NULL when it fails.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc' ...

Conflicts:
	lib/Makefile

EFI: introduce efi_strguid to convert GUID to human readable names ...

use in devinfo Protocols

Tested today on qemu with all the GUID translated

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add initial EFI architecture support ...

This adds support for running barebox in an EFI environment
on X86 PC hardware.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>