pcie: host: tegra: fix emc freq for gen-2

pcie: host: tegra: fix emc freq for gen-2

Change emc frequency for Gen-2 devices from
508 MHz to 528 MHz

Bug 200096223

Change-Id: I4772ab353093c490e57967081e1e4f6db589613c
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-on: http://git-master/r/751825
(cherry picked from commit a4e73831bfa97ab591b89de89e32cdb9f8b03900)
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-on: http://git-master/r/757876
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Laxman Dewangan <ldewangan@nvidia.com>