msm: limits: Remove devices init and de-init from probe of supply lm

Remove supply lm devices init and de-init from probe function.
Devices initialization happens only when user requests to enable it.
Cleanup driver code in the error path to avoid any unexpected
behaviour.

Change-Id: Id43a9118173d3cd192b6b91e2cb33fc34e2b0126
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>