sepolicy:perfd.te Allow access to /dev/cpu_dma_latency.

Allow Perfd access /dev/cpu_dma_latency

Change-Id: I247b0906b33780e95ac35f5df3031944bf69369f
CRs-Fixed: 1055102
diff --git a/common/perfd.te b/common/perfd.te
index 981a989..fb85729 100644
--- a/common/perfd.te
+++ b/common/perfd.te
@@ -55,3 +55,6 @@
 
 #Allow perfd to set properties
 set_prop(perfd, freq_prop)
+
+#Allow writes to /dev/cpu_dma_latency
+allow perfd device_latency:chr_file w_file_perms;