mailbox: apcs-ipc: Add compatible string for sdm660

Add compatible string in mailbox driver to match sdm660
apcs_glb device node.

Change-Id: I37b856200fce30ae41112bf909f13914e0f9584d
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>
Signed-off-by: Chetan C R <cchinnad@codeaurora.org>
1 file changed