msm: rtb: change msm_rtb default filter

msm_rtb default filter is changed to (1 << LOGK_READL | 1 << LOGK_WRITEL)
for storing register read/write access to rtb log.

Change-Id: Ib7c31fa298cb24c101756cfa6abf867216a3d92b
diff --git a/arch/arm/mach-msm/msm_rtb.c b/arch/arm/mach-msm/msm_rtb.c
index a60c213..5082c74 100644
--- a/arch/arm/mach-msm/msm_rtb.c
+++ b/arch/arm/mach-msm/msm_rtb.c
@@ -71,7 +71,7 @@
 #endif
 
 struct msm_rtb_state msm_rtb = {
-	.filter = 1 << LOGK_LOGBUF,
+	.filter = 1 << LOGK_READL | 1 << LOGK_WRITEL,
 	.enabled = 1,
 };