kconfig: fix help syntax and add spaces

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
diff --git a/ext/hal/ti/simplelink/Kconfig b/ext/hal/ti/simplelink/Kconfig
index f01c23a..2d0b37a 100644
--- a/ext/hal/ti/simplelink/Kconfig
+++ b/ext/hal/ti/simplelink/Kconfig
@@ -14,7 +14,7 @@
 	depends on NEWLIB_LIBC
 	select ERRNO
 	help
-	Build the SimpleLink host driver
+	  Build the SimpleLink host driver
 
 # Kconfig - MSP432 SDK HAL configuration