mb/google/{poppy,soraka}: Enable LTR for Root port

Enable LTR for Root port 0, where wifi card is connected.

BUG=b:65570878
TEST=After enbaling LTR on port 0 on the MB devicetree, No errors reported
     by AER driver for root port 0.

Change-Id: I222a87fe2094c8424760ccf578e32b9ac042f014
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/21548
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rajat Jain <rajatja@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
2 files changed