Reset the text attributes when initializing the console. The EFI

loader typically doesn't do this so that we end up booting the
with whatever the EFI loader has set it to last.

sys/boot/efi/libefi/efi_console.c

@@ -46,6 +46,7 @@ efi_cons_probe(struct console *cp)
 static int
 efi_cons_init(int arg)
 {
+	conout->SetAttribute(conout, EFI_TEXT_ATTR(EFI_LIGHTGRAY, EFI_BLACK));
 	return 0;
 }