Add ThinkPad X270 coreboot port from Kat Inskip

Courtesy of Kat Inskip who ported this board.

Headphone output doesn't work at the moment, due to incorrect verb.
Intel VBT is also wrong. Both are taken from another board.

This will be amended later with the correct verb and VBT.

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/vendor/x270/pkg.cfg

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# ME firmware (deguard will be used)
+DL_hash="df735a24242792bf4150f30bf0bd4fdbdc0fb6bf0f897ea533df32567be8e084006d692fb6351677f8cc976878c5018667901dbd407b0a77805754f7c101497c"
+ME_bin_hash="cc1794596695a95f02c1640bafa63e09eb7b998f7e241a02930cca12ea7a3909a66f45fd130f46a74bf062b3a650840db898e7ba356d608d495c14ca6cf9cdf0"
+DL_url="https://dl.dell.com/FOLDER04573471M/1/Inspiron_5468_1.3.0.exe"
+DL_url_bkup="https://web.archive.org/web/20241110222323/https://dl.dell.com/FOLDER04573471M/1/Inspiron_5468_1.3.0.exe"
+
+# for Fsp.fd, we don't rely on a download. Instead,
+# we copy from coreboot.git. The file is defined
+# by CONFIG_FSP_FD_PATH, split to CONFIG_FSP_M_FILE and CONFIG_FSP_S_FILE
+# and inserted to CBFS with names CONFIG_FSP_S_CBFS and CONFIG_FSP_M_CBFS
+#
+FSPFD_hash="c500166a8553a80ba8db8b8185a896e0ae1562ea3c139e07acd9e7937baf8110ba743cc79b69db09a5f39c076d1d22bc45045223975f46aea2034ba82a6b0360"
+FSPM_bin_hash="b15712a53f4d16f36b384beb6dbb716c0b0924751d6ca1e229cd4b8c03aef9eda025c235af247e53dac94d94b79559623974d0d21c7f97e125d8ecc2c86bf03f"
+FSPS_bin_hash="64ac9f93e43efddc35931e168d6594c2b39fb5a0da863d22f2d000d7eacc0692b07ce89389cbb1c5b95ff9b2bba508c538e37d0e644fcab7b2cada773da65ce6"
+
+# We will use deguard to disable the Intel Boot Guard:
+ME11bootguard="y"
+ME11delta="thinkpad_x270" # subdirectory under deguard's data/delta/
+ME11version="11.6.0.1126"
+ME11sku="2M"
+ME11pch="LP"