uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/os-specific/linux/kernel/bridge-stp-helper.patch

@@ -0,0 +1,13 @@
+diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
+index aea3d13..8fcbf81 100644
+--- a/net/bridge/br_private.h
++++ b/net/bridge/br_private.h
+@@ -39,7 +39,7 @@
+ #define BR_GROUPFWD_8021AD	0xB801u
+ 
+ /* Path to usermode spanning tree program */
+-#define BR_STP_PROG	"/sbin/bridge-stp"
++#define BR_STP_PROG	"/run/current-system/sw/bin/bridge-stp"
+ 
+ typedef struct bridge_id bridge_id;
+ typedef struct mac_addr mac_addr;