xfdump: fix size check

Firmware/xflash_dump.cpp

@@ -69,7 +69,7 @@ static void xfdump_dump_core(dump_header_t& hdr, uint32_t addr, uint8_t* buf, ui
     xflash_wait_busy();
 
     // write data
-    static_assert(sizeof(dump_t::data) < RAMEND, "dump area size insufficient");
+    static_assert(sizeof(dump_t::data) <= RAMEND, "dump area size insufficient");
     xflash_multipage_program(addr, buf, cnt);
 }