ARM : dts: msm: Enable the wake-up capability of SPMI on mdmfermium

As RPM based wake-up support is now enabled on mdmfermium, make SPMI
based interrupts wakeup capable.

Change-Id: I9da1b658cf19aeb034175bb941465797817da26f
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>