usb: gsi: Remove module param related USB IN/OUT TRBs

dma_pool_create() API is used with alignment factor 2 as USB GSI
wrapper expects TRB ring where number of TRBs are in power of 2.
If passed number of IN/OUT buffer(i.e. TRBs) count is not as power
of 2, it would result into crash. Hence resolve this issue by
removing these module params.

Also remove aggregation size related module param and new change
shall add this functionality with proper check using configfs
attributes for each USB GSI function.

Change-Id: I9e262c9d2a66d09a3dcbe632bf3f91db3de08633
Signed-off-by: Mayank Rana <mrana@codeaurora.org>