Add newlines at the end of all coreboot files

Change-Id: I7930d5cded290f2605d0c92a9c465a3f0c1291a2
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/15974
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

payloads/libpayload/arch/arm64/lib/Makefile.inc

@@ -30,4 +30,4 @@
 
 lib_access = pstate.c sysctrl.c cache.c tlb.c clock.c
 
-libc-y += $(lib_access)
+libc-y += $(lib_access)