Bring patches/coreboot-4.11 on par with master
Removed patches/coreboot-4.11/0020-kgpe-d16-vboot.patch
Removed Vboot options from KGPE-D16 coreboot configs
Enabled TPM in kgpe-d16 board configs
Enabled measured boot in kgpe-d16 coreboot configs.
Added support for video cards that require nouveau, radeon and amdgpu drivers in linux-kgpe-d16_workstation.config
`nouveau.config=NvForcePost=1` to be added to kexec'd kernels for better Nvidia card support.