修改 oem_tool 的 buff大小为8k

mfgtool/oem_tool/hw3/oem_tool_hw.c

@@ -93,7 +93,7 @@ typedef struct _current_rc_info_t {
 } current_rc_info_t;
 
 typedef struct _diff_data_buffer_t {
-    uint8_t buf[4096];
+    uint8_t buf[OEM_INFO_MAX_SIZE];
     uint16_t len_total;
     uint16_t len_cut;
     uint16_t last_offset;