treewide: Rename Sabrina to Mendocino

'Mendocino' was an embargoed name and could previously not be used
in references to Skyrim.  coreboot has references to sabrina both
in directory structure and in files. This will make life difficult
for people looking for Mendocino support in the long term. The code
name should be replaced with "mendocino".

BUG=b:239072117
TEST=Builds

Cq-Depend: chromium:3764023
Cq-Depend: chromium:3763392
Cq-Depend: chrome-internal:4876777

Signed-off-by: Jon Murphy <jpmurphy@google.com>
Change-Id: I2d0f76fde07a209a79f7e1596cc8064e53f06ada
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65861
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

src/vendorcode/amd/fsp/mendocino/platform_descriptors.h

@@ -160,11 +160,11 @@ typedef struct __packed {
 } fsp_ddi_descriptor;
 
 /*
- * Sabrina DXIO Descriptor: Used for assigning lanes to PCIe engines, configure
+ * Mendocino DXIO Descriptor: Used for assigning lanes to PCIe engines, configure
  * bifurcation and other settings. Beware that the lane numbers in here are the
  * logical and not the physical lane numbers!
  *
- * Sabrina DXIO logical lane to physical PCIe lane mapping:
+ * Mendocino DXIO logical lane to physical PCIe lane mapping:
  *
  * logical | physical
  * --------|------------