make: Remove extra CFLAGS from QEMU target

These CFLAGS were causing compilation warnings and are unnecessary.
Remove them.

Change-Id: I24aa7c77ebcb4c7f31d7365ff519789144923f31
Signed-off-by: Stephen Finucane <stephen.finucane@intel.com>
Reviewed-by: Mark D. Gray <mark.d.gray@intel.com>
qemu: Remove unused function

A static function was no used due to modifications made in Intel(R)
DPDK vSwitch. Remove it and fix the "unused-function" warning.
Additionally, remove the commented block that had rendered this
function "unused" - the block itself is available in history if
needed.

Change-Id: Icccc01ae27a953c25c9ba7ab9c36af3bd0168657
Signed-off-by: Stephen Finucane <stephen.finucane@intel.com>
Reviewed-by: Mark D. Gray <mark.d.gray@intel.com>