fix(ll): fix cpp compile error

Merges https://github.com/espressif/esp-idf/pull/12093

fix(ll): remove FLAG_ATTR macro

Such kind of operator overload will not work because C++ thinks such overload is ambiguous and it still prefer the built-in one which accepts and returns integer. Manually force type conversion seems to be unavoidable.

components/soc/esp32h2/include/soc/ext_mem_defs.h

@@ -117,7 +117,9 @@ extern "C" {
 /**
  * I/D share the MMU linear address range
  */
+#ifndef __cplusplus
 _Static_assert(SOC_MMU_IRAM0_LINEAR_ADDRESS_LOW == SOC_MMU_DRAM0_LINEAR_ADDRESS_LOW, "IRAM0 and DRAM0 linear address should be same");
+#endif
 
 
 /**