audio: enable fsa8008 for earjack detection

Change-Id: Ifc6f9aa6fa6520002dec150808bb9192e48ed0a8
diff --git a/drivers/switch/Kconfig b/drivers/switch/Kconfig
index 5238591..d07e4ab 100644
--- a/drivers/switch/Kconfig
+++ b/drivers/switch/Kconfig
@@ -12,4 +12,9 @@
 	help
 	  Say Y here to enable GPIO based switch support.
 
+config SWITCH_FSA8008
+	bool "FSA8008 Headset detection driver"
+	help
+	 Say Y here to enable FSA8008 driver
+
 endif # SWITCH