app: aboot: add upload command support to fastboot

add support for uploading the data using fastboot protocol.

Change-Id: Id144aaf88ddfe3dfcac16e492a1e47b4ae912439
diff --git a/app/aboot/fastboot.h b/app/aboot/fastboot.h
index 11355da..b1c4c8f 100644
--- a/app/aboot/fastboot.h
+++ b/app/aboot/fastboot.h
@@ -53,5 +53,9 @@
 void fastboot_fail(const char *reason);
 void fastboot_info(const char *reason);
 
+/* required for upload command
+ * should be called before calling upload
+ */
+int fboot_set_upload(void *buf, uint32_t buf_size);
 
 #endif