ASoC: wcd: use component probe/remove on WCD/WSA drivers

codec driver and component driver has duplicated .probe/.remove
functions, and codec side is just relayed it. This was quick-hack,
but no longer needed.
This patch uses component .probe/.remove.
These changes are in accordance with the upstream changes
in ASoC between Linux-4.4 and Linux-4.9 versions.

Change-Id: I676403b3989411aba2dba50065b56c2acff156a0
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>