[memory] Rework memory_initialize for new loader

Created a new `memory_initialize()` function that uses the new-style
kernel args structure from the new bootloader.

Additionally:
* Fixed a hard-coded interrupt EOI address that didn't work with new
  memory locations
* Make the `page_manager::fault_handler()` automatically grant pages
  in the kernel heap

Tags: boot page fault

src/kernel/main.cpp

@@ -84,13 +84,9 @@ kernel_main(args::header *header)
 	cpu_id cpu;
 	cpu.validate();
 
-	/*
-	memory_initialize(
-			header->scratch_pages,
-			header->memory_map,
-			header->memory_map_length,
-			header->memory_map_desc_size);
+	memory_initialize(header);
 
+	/*
 	kutil::allocator &heap = g_kernel_heap;
 
 	if (header->frame_buffer && header->frame_buffer_length) {