common/cnxk: update inline asm prefix
common/cnxk: update inline asm prefix

Update inline asm prefix to prevent overriding cpu type, instead express
the additional extensions required.

Signed-off-by: Pavan Nikhilesh <8184a94f8f7778086ea0697cdb513b2e42813b09@marvell.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk