bcm27xx: add kernel 5.10 support

Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted
patches, wireless patches and defconfig patches.

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 4B v1.1 4G
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0190-of-overlay-Correct-symbol-path-fixups.patch b/target/linux/bcm27xx/patches-5.10/950-0190-of-overlay-Correct-symbol-path-fixups.patch
new file mode 100644
index 0000000000..cbbf4937f7
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0190-of-overlay-Correct-symbol-path-fixups.patch
@@ -0,0 +1,37 @@
+From 68e9899b2c99dbe97ecf9008e7e43f5b393f26a3 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 6 Feb 2020 12:23:15 +0000
+Subject: [PATCH] of: overlay: Correct symbol path fixups
+
+When symbols from overlays are added to the live tree their paths must
+be rebased. The translated symbol is normally the result of joining
+the fragment-relative path (with a leading "/") to the target path
+(either copied directly from the "target-path" property or resolved
+from the phandle). This translation fails when the target is the root
+node (a common case for Raspberry Pi overlays) because the resulting
+path starts with a double slash. For example, if target-path is "/" and
+the fragment adds a node called "newnode", the label associated with
+that node will be assigned the path "//newnode", which can't be found
+in the tree.
+
+Fix the failure case by explicitly replacing a target path of "/" with
+an empty string.
+
+Fixes: d1651b03c2df ("of: overlay: add overlay symbols to live device tree")
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ drivers/of/overlay.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/drivers/of/overlay.c
++++ b/drivers/of/overlay.c
+@@ -245,6 +245,8 @@ static struct property *dup_and_fixup_sy
+ 	if (!target_path)
+ 		return NULL;
+ 	target_path_len = strlen(target_path);
++	if (!strcmp(target_path, "/"))
++		target_path_len = 0;
+ 
+ 	new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
+ 	if (!new_prop)