target : msm8952: Enable reading from pmi8952 for long press

Long press feature is shared by other targets apart from 8952 which may have
different pmic/pmi configuration. Localize the change to 8952/8956 targets
only

Change-Id: Ibea57f9e07e80b8e383e763154bc720c719d3819
diff --git a/target/msm8952/rules.mk b/target/msm8952/rules.mk
index 3471c09..1bfb588 100644
--- a/target/msm8952/rules.mk
+++ b/target/msm8952/rules.mk
@@ -15,6 +15,8 @@
 DEFINES += DISPLAY_TYPE_MIPI=1
 DEFINES += DISPLAY_TYPE_DSI6G=1
 
+DEFINES += PMI_CONFIGURED=1
+
 MODULES += \
 	dev/keys \
 	lib/ptable \