treewide: split off license text, remove extra copyright notices

Copyright notices are best stored in AUTHORS

Change-Id: Ib9025c58987ee2f7db600e038f5d3e4edc69aacc
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41203
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/quark/bootblock/esram_init.S

@@ -1,4 +1,4 @@
-/** @file
+/*
  *
  *
  * Redistribution and use in source and binary forms, with or without

src/soc/intel/quark/include/soc/pei_wrapper.h

@@ -1,5 +1,4 @@
 /*
- * UEFI PEI wrapper
  *
  *
  * Redistribution and use in source and binary forms, with or without