hekate: use IRAM for stack

bootloader/main.c

@@ -1487,10 +1487,10 @@ void ipl_main()
 	// Do initial HW configuration. This is compatible with consecutive reruns without a reset.
 	hw_init();
 
-	// Pivot the stack so we have enough space.
-	pivot_stack(IPL_STACK_TOP);
+	// Pivot the stack under IPL. (Only max 4KB is needed).
+	pivot_stack(IPL_LOAD_ADDR);
 
-	// Tegra/Horizon configuration goes to 0x80000000+, package2 goes to 0xA9800000, we place our heap in between.
+	// Place heap at a place outside of L4T/HOS configuration and binaries.
 	heap_init((void *)IPL_HEAP_START);
 
 #ifdef DEBUG_UART_PORT