usb: gadget: set keep_ipa_awake to false for all data functions

The keep_ipa_awake flag is used in order to override the IPA clock
gating mechanism.
This fix removes the initial setting for the flag in fix:
18364b84 usb: bam: add support for new ipa connect paramater
An explanation regarding the flag's purpose is also in the original
fix.
Per new capabilities of the IPA driver - this parameter
is set to false for all data functions. As false is the default
setting (due to kzalloc), no implicit setting will be performed.

Change-Id: Ibd1e40aea1f56ad278419eb4576a49df4d6c8594
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>