scsi: fcoe: Statically initialize flogi_maddr

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy() avoid using an inline const buffer
argument and instead just statically initialize the destination array
directly.

Link: https://lore.kernel.org/r/20210602180000.3326448-1-keescook@chromium.org
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>