fixed bad formating of ekf2 CMakeFile

src/modules/ekf2/CMakeLists.txt

@@ -31,19 +31,18 @@
 #
 #############################################################################
 set(MODULE_CFLAGS)
-
-if ($ {OS} STREQUAL "nuttx")
-	list(APPEND MODULE_CFLAGS - Wframe - larger - than = 4000)
-	endif()
-	px4_add_module(
-		MODULE modules__ekf2
-		MAIN ekf2
-		COMPILE_FLAGS $ {MODULE_CFLAGS}
-		STACK 1000
-		SRCS
+if (${OS} STREQUAL "nuttx")
+	list(APPEND MODULE_CFLAGS -Wframe-larger-than=4000)
+endif()
+px4_add_module(
+	MODULE modules__ekf2
+	MAIN ekf2
+	COMPILE_FLAGS ${MODULE_CFLAGS}
+	STACK 1000
+	SRCS
 		ekf2_main.cpp
-		DEPENDS
+	DEPENDS
 		platforms__common
 		git_ecl
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix :
+# vim: set noet ft=cmake fenc=utf-8 ff=unix :