msm: buspm: Enable busPM for targets which support bus scaling.

BusPM module should not depend on individual target configs
as it previously was. Fix this by tying busPM module with
MSM_BUS_SCALING conifg and enable it on all targets where
bus scaling is enabled.

CRs-Fixed: 486454
Change-Id: I5e44b6b63dd8577a5db6fa6f34526af0a4933c82
Signed-off-by: Gagan Mac <gmac@codeaurora.org>
diff --git a/arch/arm/configs/msm8974_defconfig b/arch/arm/configs/msm8974_defconfig
index b0c1284..c44cfa4 100644
--- a/arch/arm/configs/msm8974_defconfig
+++ b/arch/arm/configs/msm8974_defconfig
@@ -63,6 +63,7 @@
 CONFIG_MSM_DIRECT_SCLK_ACCESS=y
 CONFIG_MSM_EVENT_TIMER=y
 CONFIG_MSM_BUS_SCALING=y
+CONFIG_MSM_BUSPM_DEV=m
 CONFIG_MSM_WATCHDOG_V2=y
 CONFIG_MSM_MEMORY_DUMP=y
 CONFIG_MSM_DLOAD_MODE=y