Revert "watchdog: tegra: Add support for FIQ debugger"

Revert "watchdog: tegra: Add support for FIQ debugger"

This reverts commit cef3ced89dcd2f00532a5e7b023aeaacfd716f56.

"FIQ debugger support" is a hack that disables the real uses of
the FIQ debugger.

Reviewed-on: http://git-master/r/433775
(cherry picked from commit a96ce5e48bd7e71f323c054a5d5181c11ab0f20d)

Change-Id: Ia081e5a02980f1e38b66e78471903ba94d95722e
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Arun Kannan <akannan@nvidia.com>
Reviewed-on: http://git-master/r/454841
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Tested-by: Mitch Luban <mluban@nvidia.com>
GVS: Gerrit_Virtual_Submit