mm: allow access fastrpc total_dma_kb sysfs

Bug: 168084904
Test: boot
Signed-off-by: Martin Liu <liumartin@google.com>
Change-Id: I8a548fa667072f188b86d101b874a7cf8c9d5d79
diff --git a/mm/file.te b/mm/file.te
index e6b53f0..8541232 100644
--- a/mm/file.te
+++ b/mm/file.te
@@ -1,3 +1,4 @@
 type mm_logd_vendor_data_file, file_type, data_file_type;
 type debugfs_page_owner, debugfs_type, fs_type;
+type sysfs_fastrpc, sysfs_type, fs_type;