video: tegra: host: Disable host1x irqs at suspend

host1x interrupts have been left on at suspend due to using wrong
constant for the interrupt register. Disable host1x interrupts at
suspend.

Change-Id: I915fc4e663e6ad90fccacff6fb223c5080e21fcd
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/123055
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Andrew Howe <ahowe@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Mayuresh Kulkarni <mkulkarni@nvidia.com>
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>