esoc: Modify probe to include driver instance

Modify esoc driver probe definition to pass back
not only the matches esoc control link but also
the corresponding driver instance to allow for
a module to register multiple driver instances.

Change-Id: I5257a537b00acf5ef6be6cec9dd29324c4b76f81
Signed-off-by: Hanumant Singh <hanumant@codeaurora.org>