linux-5.3_rc8-289: Select PSTORE and EFI_VARS_PSTORE

Enable ways to store Linux messages in case of panics.

    config PSTORE
    	tristate "Persistent store support"
    	select CRYPTO if PSTORE_COMPRESS
    	default n
    	help
    	   This option enables generic access to platform level
    	   persistent storage via "pstore" filesystem that can
    	   be mounted as /dev/pstore.  Only useful if you have
    	   a platform level driver that registers with pstore to
    	   provide the data, so you probably should just go say "Y"
    	   (or "M") to a platform specific persistent store driver
    	   (e.g. ACPI_APEI on X86) which will select this for you.
    	   If you don't have a platform persistent store driver,
    	   say N.

That implicitly selects the option `EFI_VARS_PSTORE` below.

    config EFI_VARS_PSTORE
    	tristate "Register efivars backend for pstore"
    	depends on EFI_VARS && PSTORE
    	default y
    	help
    	  Say Y here to enable use efivars as a backend to pstore. This
    	  will allow writing console messages, crash dumps, or anything
    	  else supported by pstore to EFI variables.

Fixes: #1249

linux-5.3_rc8-289.bee

@@ -835,6 +835,7 @@ mee_configure() {
 	CONFIG_SQUASHFS_XZ=y
 	CONFIG_SQUASHFS_4K_DEVBLK_SIZE=y
 	CONFIG_SQUASHFS_EMBEDDED=y
+	CONFIG_PSTORE=m
 	CONFIG_NFS_FS=m
 	CONFIG_NFS_V3_ACL=y
 	CONFIG_NFS_V4=m