arm64: tegra: Wrong AON HSP reg property size

The AON HSP node's "reg" property size 0xa0000 will overlap with other
resources. This patch fixes that wrong value with correct size 0x90000.

Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Dipen Patel <dipenp@nvidia.com>
Fixes: a38570c2 ("arm64: tegra: Add nodes for TCU on Tegra194")
Signed-off-by: Thierry Reding <treding@nvidia.com>