SF: Bring back support for disabling backpressure propagation

[Pulkit077]: Adapt to A14 QPR1

Taken from CLO (QSSI 13). Some Qualcomm devices can still
benefit from disabling backpressure propagation by setting:

debug.sf.disable_backpressure=1

Change-Id: I669a6059a2a971aa79603e74153fa93729f703db
Signed-off-by: Pulkit077 <pulkitagarwal2k1@gmail.com>
6 files changed