cpufreq: interactive: Put global cpufreq kobject on failure

Fix failure recovery path in cpufreq_governor_interactive(). Call
cpufreq_put_global_kobject() to release cpufreq global kobject upon
governor init failure.

Change-Id: I7a977070b7a3c75c90acccd2c117064ed1a10d0e
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>