net: wget: allow EFI boot

net: wget: allow EFI boot

wget followed by bootefi currently fails as follows:

 U-Boot> wget 200000 192.168.0.30:helloworld.efi
 Waiting for Ethernet connection... done.
 HTTP/1.0 200 OK
 Packets received 13, Transfer Successful
 Bytes transferred = 12720 (31b0 hex)
 U-Boot> bootefi 200000
 No UEFI binary known at 200000
 U-Boot>

Fix the problem by adding the missing efi_set_bootdev() call.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>