Remove executable flag from source codes and text files

Markdown, definition file and sconfig source codes don't need to be
executables. This patch fixes that.

Signed-off-by: Petr Cvek <petrcvekcz@gmail.com>
Change-Id: Ic97d684318c689259f7895e3dfbd552434c3882e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65807
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/Documentation/soc/amd/amdblobs_license.md b/Documentation/soc/amd/amdblobs_license.md
old mode 100755
new mode 100644
diff --git a/Documentation/soc/amd/family17h.md b/Documentation/soc/amd/family17h.md
old mode 100755
new mode 100644
diff --git a/Documentation/soc/amd/psp_integration.md b/Documentation/soc/amd/psp_integration.md
old mode 100755
new mode 100644
diff --git a/payloads/external/tianocore/tools_def.txt b/payloads/external/tianocore/tools_def.txt
old mode 100755
new mode 100644
diff --git a/util/sconfig/sconfig.l b/util/sconfig/sconfig.l
old mode 100755
new mode 100644
diff --git a/util/sconfig/sconfig.y b/util/sconfig/sconfig.y
old mode 100755
new mode 100644