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/drivers/intel/gma/intel_bios.h

@@ -1,6 +1,4 @@
 /*
- * Copyright © 2006 Intel Corporation
- *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
@@ -19,7 +17,8 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
- *
+ */
+/*
  * Authors:
  *    Eric Anholt <eric@anholt.net>
  *