package/edk2-platforms: refine license

The edk2-platforms project is licensed under the BSD-2-Clause license with
a patent grant, as per commit ae604e4ffe8f ("edk2-platforms: Change
License.txt from 2-Clause BSD to BSD+Patent").

There is a BSD-2-Clause-Patent SPDX license identifier[1] for this case,
therefore refine the edk2-platforms package to use this more specific
identifier.

[1]: https://spdx.org/licenses/BSD-2-Clause-Patent.html

Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>
Cc: Dick Olsson <hi@senzilla.io>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 9bd126698397eb3105340f48e4f033e09b34aaf7)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/edk2-platforms/edk2-platforms.mk

@@ -7,7 +7,7 @@
 # Keep in sync with latest commit as of the release date for boot/edk2
 EDK2_PLATFORMS_VERSION = db922e1253cb6f1fc456805bc42fb7d401eed5c2
 EDK2_PLATFORMS_SITE = $(call github,tianocore,edk2-platforms,$(EDK2_PLATFORMS_VERSION))
-EDK2_PLATFORMS_LICENSE = BSD-2-Clause
+EDK2_PLATFORMS_LICENSE = BSD-2-Clause-Patent
 EDK2_PLATFORMS_LICENSE_FILES = License.txt
 EDK2_PLATFORMS_INSTALL_TARGET = NO
 EDK2_PLATFORMS_INSTALL_STAGING = YES