go: Update 1.15.5 -> 1.15.6

go: Update 1.15.5 -> 1.15.6

The deleted patch file mentioned below is removed since 1.15.6
already has the issue patched.

Signed-off-by: Khairul Rohaizzat Jamaluddin <khairul.rohaizzat.jamaluddin@intel.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit ab41033b4202341a3767d1c54c86e08c7e37610f)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>