msm: cpr: Update the CPR enable flag if probe fails

CPR probe could fail due to other checks and allocation
failures. CPR exports few functions like enable/disable/suspend/
resume functions so it is necessary to maintain the enable
flag to reflect the same status.

Change-Id: I5f54d037210c24bbcbac6560aabc3065895e1f9f
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>