qcacmn: Fix -Wmissing-prototypes in dp_main.c

We want to enable the compiler's -Wmissing-prototypes switch, but
there is existing code in dp_main.c that is generating warnings.  Fix
these warnings by making all functions static that are only referenced
internally to dp_main.c.

Change-Id: If22f66ecdc3dbf4e91dbd32bb0e994a281d729e9
CRs-Fixed: 1110193
1 file changed