fix(xilinx): optimize logic to read IPI response

Optimize logic to read IPI response from firmware and avoid using
temporary buffer. Also, use pointer instead of array as per standard
format to pass by reference in function.

Change-Id: I45ebaeacc932a11bbfd4b7d9b9c43b4ee8ee7df2
Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
1 file changed