msm: ipa4: Allocate coalescing close frame command payload

Coalescing close frame command allocated multiple times during
every suspend instead allocate command payload once in post init.

Change-Id: Iba83a7ff032707739d0a3b006ee6fa5245ac3857
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>