ANDROID: mm: build alloc_contig_dump_pages in page_alloc.o

GKI has CONFIG_DYNAMIC_DEBUG_CORE. Thus, to enable only the
specific alloc_contig_dump_pages without needing all pr_debug
in every source files is using -DCONFIG_DYNAMIC_MODULE
when the page_alloc.o compiled.

Bug: 182195592
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: I93266eb4161b3653389c737d4c767fd5d1083339

mm/Makefile

@@ -57,6 +57,7 @@ obj-y			:= filemap.o mempool.o oom_kill.o fadvise.o \
 # Give 'page_alloc' its own module-parameter namespace
 page-alloc-y := page_alloc.o
 page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o
+CFLAGS_page_alloc.o += -DDYNAMIC_DEBUG_MODULE
 
 obj-y += page-alloc.o
 obj-y += init-mm.o