RPI kernel 4.19 support

root/target/linux/brcm2708/patches-4.19/0286-tpm-Make-SECURITYFS-a-weak-dependency.patch

@@ -0,0 +1,40 @@
+From b641c7a1f9d3bc5b3b21b512178bc162e4c1eac6 Mon Sep 17 00:00:00 2001
+From: Peter Huewe <peterhuewe@gmx.de>
+Date: Mon, 3 Sep 2018 21:51:51 +0200
+Subject: [PATCH 286/432] tpm: Make SECURITYFS a weak dependency
+
+commit 2f7d8dbb11287cbe9da6380ca14ed5d38c9ed91f upstream.
+
+While having SECURITYFS enabled for the tpm subsystem is beneficial in
+most cases, it is not strictly necessary to have it enabled at all.
+Especially on platforms without any boot firmware integration of the TPM
+(e.g. raspberry pi) it does not add any value for the tpm subsystem,
+as there is no eventlog present.
+
+By turning it from 'select' to 'imply' it still gets selected per
+default, but enables users who want to save some kb of ram by turning
+SECURITYFS off.
+
+Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
+Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+---
+ drivers/char/tpm/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
+index 18c81cbe4704..536e55d3919f 100644
+--- a/drivers/char/tpm/Kconfig
++++ b/drivers/char/tpm/Kconfig
+@@ -5,7 +5,7 @@
+ menuconfig TCG_TPM
+ 	tristate "TPM Hardware Support"
+ 	depends on HAS_IOMEM
+-	select SECURITYFS
++	imply SECURITYFS
+ 	select CRYPTO
+ 	select CRYPTO_HASH_INFO
+ 	---help---
+-- 
+2.19.1
+