interconnect: qcom: bcm-voter: add a missing of_node_put()

Add a missing of_node_put() in of_bcm_voter_get() to avoid the
reference leak.

Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/1619116570-13308-1-git-send-email-subbaram@codeaurora.org


Fixes: 976daac4 ("interconnect: qcom: Consolidate interconnect RPMh support")
Signed-off-by: Georgi Djakov <djakov@kernel.org>