memshare: Enable info logs to help in debug alloc failure

Presently debug logs to help analyze errors related to QMI requests
for memory size query, allocation and free are not enough.
Enabling few logs to add debuggability and modify debug logs to
dev_* calls.

Change-Id: I1c48681782a41dd83b87ec7ccfd237cf8c74494a
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>