security/intel/txt: Remove unused region device

Region device is no longer used to locate BIOS ACM. Use new CBFS API
to map and unmap the file. Using rdev_munmap on the uninitialized
region device variable causes the platform to jump to a random address.

TEST=Dell OptiPlex 9010 does not raise #UD exception when Intel TXT is
enabled, ACM SCHECK is successful

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: I98afba35403d5d2cd9eeb7df6d1ca0171894e9d4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59515
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

0 files changed, 0 insertions, 0 deletions