msm: ipa: changes in virtual mode behavior

Add clock enabling/disabling on virtual platform.
As enable_irq_wake() is not supported on virtual
platform, do not register to SPS with SPS_BAM_OPT_IRQ_WAKEUP.

Change-Id: I31baa16f01390d7d60542023ffae091a2081a85a
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Ravit Katzav <rkatzav@codeaurora.org>