initial buildroot for linux 5.15

package/edk2-platforms/Config.in

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+config BR2_PACKAGE_EDK2_PLATFORMS
+	bool
+	help
+	  EDK2 description files for all supported platforms.
+	  The main EDK2 bootloader package will depend on these
+	  description files while building firmware for some platforms.
+
+	  https://github.com/tianocore/edk2-platforms

package/edk2-platforms/edk2-platforms.hash

@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  dfdc34fea86e5037a3a6cbd2a83b1f655f16b4c9ab4f5ff9da91e45a358c9a14  edk2-platforms-db922e1253cb6f1fc456805bc42fb7d401eed5c2.tar.gz
+sha256  50ce20c9cfdb0e19ee34fe0a51fc0afe961f743697b068359ab2f862b494df80  License.txt

package/edk2-platforms/edk2-platforms.mk

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+################################################################################
+#
+# edk2-platforms
+#
+################################################################################
+
+# 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_FILE = License.txt
+EDK2_PLATFORMS_INSTALL_TARGET = NO
+EDK2_PLATFORMS_INSTALL_STAGING = YES
+
+# There is nothing to build for edk2-platforms. All we need to do is to copy
+# all description files to staging, for other packages to build with.
+define EDK2_PLATFORMS_INSTALL_STAGING_CMDS
+	mkdir -p $(STAGING_DIR)/usr/share/edk2-platforms
+	cp -rf $(@D)/*/ $(STAGING_DIR)/usr/share/edk2-platforms/
+endef
+
+$(eval $(generic-package))