Update pulp_riscv_dbg to pulp-platform/riscv-dbg@834853c

Update code from upstream repository https://github.com/pulp-
platform/riscv-dbg to revision
834853c0c68fc48d032a3e256e563f2b0bd28492

Signed-off-by: Michael Schaffner <msf@google.com>

hw/vendor/patches/pulp_riscv_dbg/0001-Style-lint-cleanup-to-make-Verible-lint-happy.patch

diff --git a/hw/vendor/patches/pulp_riscv_dbg/0001-Style-lint-cleanup-to-make-Verible-lint-happy.patch b/hw/vendor/patches/pulp_riscv_dbg/0001-Style-lint-cleanup-to-make-Verible-lint-happy.patch
index 1c5668c..0d329ef 100644
--- a/hw/vendor/patches/pulp_riscv_dbg/0001-Style-lint-cleanup-to-make-Verible-lint-happy.patch
+++ b/hw/vendor/patches/pulp_riscv_dbg/0001-Style-lint-cleanup-to-make-Verible-lint-happy.patch
@@ -212,5 +212,5 @@
        end
  
 -- 
-2.27.0.389.gc38d7665816-goog
+2.28.0.rc0.105.gf9edc3c819-goog