msm: ipa3: Fix to move the spin lock handle to starting of struct

Observing spin lock handle corruption in kasan testing. To avoid
handle corruption moving the spin lock handle to starting of struct.

Change-Id: Id77dd2deac1af80fde11418e96c56dd86c67599b
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>