Memmap: Re-organize memory function in two files

memory.cpp/h contains definitions related to acessing memory and
configuring the address space
mem_map.cpp/h contains higher-level definitions related to configuring
the address space accoording to the kernel and allocating memory.

src/core/CMakeLists.txt

@@ -99,7 +99,7 @@ set(SRCS
             loader/loader.cpp
             loader/ncch.cpp
             mem_map.cpp
-            mem_map_funcs.cpp
+            memory.cpp
             settings.cpp
             system.cpp
             )
@@ -211,6 +211,7 @@ set(HEADERS
             loader/loader.h
             loader/ncch.h
             mem_map.h
+            memory.h
             settings.h
             system.h
             )