serial: msm_geni_serial: Vote resources even if power framework is disabled

Currently the driver's resource voting is tied into the runtime framework.
But if the runtime framework isn't available, which can happen around
certain portions of the system resume path, then the driver can't
vote resources on and can't do transactions.
To get past this, vote the resources on even if the runtime framework
isn't available.

Change-Id: I645245010dbe6f00c9227b1ea0f767badf01278e
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>