efi_loader: include definition of allow_unaligned()

Add missing include.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
index f0f01d3..69aaefa 100644
--- a/lib/efi_loader/efi_setup.c
+++ b/lib/efi_loader/efi_setup.c
@@ -11,6 +11,7 @@
 #include <efi_loader.h>
 #include <efi_variable.h>
 #include <log.h>
+#include <asm-generic/unaligned.h>
 
 #define OBJ_LIST_NOT_INITIALIZED 1