ANDROID: ASoC: core: add locked version of soc_find_component

Add a locked version of the API to use from clients
to ensure accessing component list safely.

Change-Id: I73c7f2ed03b7e76f6816b62ba0974bc05bdbb4b4
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>
(cherry picked from commit 99b4176a)
Signed-off-by: Will McVicker <willmcvicker@google.com>