bootloader, esp32: add workaround for Tensilica erratum 572

If zero-overhead loop buffer is enabled, under certain rare conditions
when executing a zero-overhead loop, the CPU may attempt to execute an invalid instruction. Work around by disabling the buffer.

components/esp32/cpu_start.c

@@ -124,6 +124,7 @@ void IRAM_ATTR call_start_cpu0()
     RESET_REASON rst_reas[2];
 #endif
     cpu_configure_region_protection();
+    cpu_init_memctl();
 
     //Move exception vectors to IRAM
     asm volatile (\
@@ -249,6 +250,7 @@ void IRAM_ATTR call_start_cpu1()
 
     ets_set_appcpu_boot_addr(0);
     cpu_configure_region_protection();
+    cpu_init_memctl();
 
 #if CONFIG_CONSOLE_UART_NONE
     ets_install_putc1(NULL);