MFH: r424888

multimedia/{lib,}x264: unbreak ASM on mips* after r422672

ASM=on is nop on many Tier2 and Tier3 architectures: arm + armeb, mips +
mipsel, ia64, sparc64. mips64 may be able to use MSA optimizations but the
ancient GCC in base doesn't support -msa flag and lang/gcc* are broken.

arm (aka armv4t) failed as:

You specified a pre-ARMv6 or Thumb-1 CPU in your CFLAGS.
If you really want to run on such a CPU, configure with --disable-asm.

mips (o32) failed as: [1]

You specified a pre-MSA CPU in your CFLAGS.
If you really want to run on such a CPU, configure with --disable-asm.

PR: 213443
Reported by: pkg-fallout [1]
Obtained from: PkgSrc
Approved by: portmgr blanket
Approved by: ports-secteam blanket