[NTOSKRNL][NDK] Get rid of SECTION_OBJECT typedef

We will use the more recent SECTION (already used in ARM3) and this will avoid confusions

ntoskrnl/mm/ARM3/section.c

···
 NTAPI
 MmGetFileObjectForSection(IN PVOID SectionObject)
 {
-    PSECTION_OBJECT Section;
+    PSECTION Section;
     ASSERT(KeGetCurrentIrql() == PASSIVE_LEVEL);
     ASSERT(SectionObject != NULL);
 
···
 NTAPI
 MmGetImageInformation (OUT PSECTION_IMAGE_INFORMATION ImageInformation)
 {
-    PSECTION_OBJECT SectionObject;
+    PSECTION SectionObject;
 
     /* Get the section object of this process*/
     SectionObject = PsGetCurrentProcess()->SectionObject;

ntoskrnl/ps/process.c

···
     PEPROCESS Process, Parent;
     PVOID ExceptionPortObject;
     PDEBUG_OBJECT DebugObject;
-    PSECTION_OBJECT SectionObject;
+    PSECTION SectionObject;
     NTSTATUS Status, AccessStatus;
     ULONG_PTR DirectoryTableBase[2] = {0,0};
     KAFFINITY Affinity;

sdk/include/ndk/mmtypes.h

···
 } SEGMENT_OBJECT, *PSEGMENT_OBJECT;
 
 //
-// Section Object
-//
-typedef struct _SECTION_OBJECT
-{
-    PVOID StartingVa;
-    PVOID EndingVa;
-    PVOID Parent;
-    PVOID LeftChild;
-    PVOID RightChild;
-    PSEGMENT_OBJECT Segment;
-} SECTION_OBJECT, *PSECTION_OBJECT;
-
-//
 // Generic Address Range Structure
 //
 typedef struct _ADDRESS_RANGE