Revert "Revert "Enable scheduler boost for zygote.""

This reverts commit 5add0dc839132ca2f20c93852727f6020b7a63a0.

Change-Id: Iccabf622a766a3cdf93a88d23ff7f337b31fdaa5
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 2ff50e0..a8a5512 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -30,6 +30,7 @@
 TARGET_2ND_CPU_VARIANT := cortex-a7
 
 ENABLE_CPUSETS := true
+ENABLE_SCHED_BOOST := true
 
 BOARD_KERNEL_BASE        := 0x00000000
 BOARD_KERNEL_PAGESIZE    := 4096