ARM: dts: msm: Modify sleep settings on SPI-8 pins for SDM845

Modify the sleep state of SPI-8 to be the same as the active state so the
pins are left in the QUP function select all the time.
This is recommended based on the slaves connected to the controller.

Change-Id: Iff2a9bdc49e2ff651bc177b75cc9484f11f9fca9
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>