msm: board-8960: Bump SPI GPIO drive strength to 12mA

This is required for SPI Ethernet support on MSM8960v2
targets.

Change-Id: Ia121b19a1d93eed0beef841a0c1a9aa30458468e
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
1 file changed