fastboot: add UUU command UCmd and ACmd support

add support for the UUU commands ACmd and UCmd.

Enable them through the Kconfig option
CONFIG_FASTBOOT_UUU_SUPPORT

base was commit in NXP kernel
9b149c2a2882: ("MLK-18591-3 android: Add FSL android fastboot support")

and ported it to current mainline. Tested this patch
on imx6ul based board.

Signed-off-by: Heiko Schocher <hs@denx.de>
Acked-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/include/fastboot.h b/include/fastboot.h
index 797d7df..57daaf1 100644
--- a/include/fastboot.h
+++ b/include/fastboot.h
@@ -44,6 +44,10 @@
 #if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_BOOTBUS)
 	FASTBOOT_COMMAND_OEM_BOOTBUS,
 #endif
+#if CONFIG_IS_ENABLED(FASTBOOT_UUU_SUPPORT)
+	FASTBOOT_COMMAND_ACMD,
+	FASTBOOT_COMMAND_UCMD,
+#endif
 
 	FASTBOOT_COMMAND_COUNT
 };
@@ -169,4 +173,7 @@
  */
 void fastboot_data_complete(char *response);
 
+#if CONFIG_IS_ENABLED(FASTBOOT_UUU_SUPPORT)
+void fastboot_acmd_complete(void);
+#endif
 #endif /* _FASTBOOT_H_ */