src: Fix up #-commented SPDX headers

Delete leading empty comment lines.

Change-Id: I8e14a0ad1e1e2227e4fb201f5d157f56f289f286
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41838
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/biostar/a68n_5200/cmos.layout

@@ -1,7 +1,4 @@
 #*****************************************************************************
-#
-#
-#
 # SPDX-License-Identifier: GPL-2.0-only
 
 #*****************************************************************************

src/mainboard/biostar/am1ml/cmos.layout

@@ -1,7 +1,4 @@
 #*****************************************************************************
-#
-#
-#
 # SPDX-License-Identifier: GPL-2.0-only
 
 #*****************************************************************************