target: msm8952: increase heap size for mdtp feature

Increases the heap size to 2MB as part of mdtp requirements

Change-Id: Ibd780e66c4a1b44ce444ea9b6e1775e603456c1d
diff --git a/target/msm8952/rules.mk b/target/msm8952/rules.mk
index cbec585..a956363 100644
--- a/target/msm8952/rules.mk
+++ b/target/msm8952/rules.mk
@@ -6,7 +6,7 @@
 PLATFORM := msm8952
 
 MEMBASE := 0x8F600000 # SDRAM
-MEMSIZE := 0x00100000 # 1MB
+MEMSIZE := 0x00200000 # 2MB
 
 BASE_ADDR        := 0x80000000
 SCRATCH_ADDR     := 0x90000000