msm: gsi: do not register to inter ee irq

Inter EE commands and IRQ are not supported currently
and AP does not have access to those.

CRs-Fixed: 1048160
Change-Id: I033044db83e8af6fb0976d711ea12c2f99291f91
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>