mm.c/h -> frames.c/h: Naming indicating dealing with physical not virtual memory

kernel/init.c

@@ -20,9 +20,9 @@
 
 #include <console.h>
 #include <framebuffer.h>
+#include <frames.h>
 #include <kmalloc.h>
 #include <print.h>
-#include <mm.h>
 #include <mmu.h>
 #include <types.h>
 
@@ -109,7 +109,7 @@ int main(void) {
 	serial_console_init();
 
 	//setup memory subsystems
-	mm_init();
+	frames_init();
 	kmalloc_init();
 	if (detect_memory()) {
 		print("Error: Failed to detect memory.\n");