BT: Check slimbus configuration enabled or not

Disable BTFM slimbus driver if core slimbus disabled.

Change-Id: I6bcbe037181021d4449f345a81d257a2bc2deab6

Android.mk

@@ -6,7 +6,9 @@ LOCAL_PATH := $(call my-dir)
 ifeq ($(call is-board-platform-in-list,taro kalama), true)
 
 BT_SELECT := CONFIG_MSM_BT_POWER=m
+ifdef CONFIG_SLIMBUS
 BT_SELECT += CONFIG_BTFM_SLIM=m
+endif
 BT_SELECT += CONFIG_I2C_RTC6226_QCA=m
 
 LOCAL_PATH := $(call my-dir)