ARM: tegra: dtb: keep pcie disable by default

ARM: tegra: dtb: keep pcie disable by default

pcie is not available in all the platforms based
on T124 or T132. So, by default keep it disabled.
Otherwise there are probe errors seen

Bug 1518254

Change-Id: Id869a36dcbb8b46434d91c4f1c1ad4ed5a37c63b
Signed-off-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-on: http://git-master/r/418724
(cherry picked from commit d2238db744c35a539d1f219b5c57bc8949d6cd73)
Reviewed-on: http://git-master/r/420375
GVS: Gerrit_Virtual_Submit
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>