ARM: dts: Optimize the gpio status at RBSC

The gpio67 and gpio91 are wrong pull status which will lead
the power current leakage. So we need fix them and save
power.

Change-Id: I7a1f02eb3c549b95b72b6f3ef4d355c0e47d5cd1
Signed-off-by: xiaolin <xiaolin@codeaurora.org>