Add out-of-tree Gasket driver for Google Coral support (#1848)

The Google Gasket driver has been removed from the main kernels staging
tree between 5.10 and 5.15 development window. Readd Google's
out-of-tree driver to continiue support Google Coral devices.

buildroot-external/package/gasket/Config.in

@@ -0,0 +1,7 @@
+config BR2_PACKAGE_GASKET
+	tristate "Coral Gasket Driver"
+	depends on BR2_LINUX_KERNEL
+	---help---
+	  Driver for Gasket (Google ASIC Software, Kernel Extensions, and Tools)
+          is a top level driver for lightweight communication with Google ASICs.
+          Apex refers to the EdgeTPU v1.

buildroot-external/package/gasket/gasket.mk

@@ -0,0 +1,20 @@
+GASKET_VERSION = 97aeba584efd18983850c36dcf7384b0185284b3
+GASKET_SITE = $(call github,google,gasket-driver,$(GASKET_VERSION))
+GASKET_LICENSE = GPL-2.0
+GASKET_LICENSE_FILES = LICENSE
+GASKET_MODULE_SUBDIRS = src
+
+#GASKET_MODULE_MAKE_OPTS = \
+#	CONFIG_RTL8822BU=m \
+#	KVER=$(LINUX_VERSION_PROBED) \
+#	KBASE=$(LINUX_DIR) \
+#	CROSS_COMPILE=$(TARGET_CROSS)
+
+#ifeq (arm, $(filter arm, $(KERNEL_ARCH)))
+#GASKET_MODULE_MAKE_OPTS += CONFIG_PLATFORM_ARM_RPI=y
+#else
+#GASKET_MODULE_MAKE_OPTS += CONFIG_PLATFORM_I386_PC=y
+#endif
+
+$(eval $(kernel-module))
+$(eval $(generic-package))