tune-arm1176jzfs-s.inc: Add hard float profile, arm1176jzfshf, in AVAILTUNES

* arm1176jzfshf uses -mtune=hard.
* Add -mfpu=vfp if vfp is included in TUNE_FEATURES

Signed-off-by: Kazuya Nishimura <kazuya.nisimura@gmail.com>
Change-Id: If81977cacbba052fa30c4a407ec65e93148d2ee3
Merge "tune-arm1176jzfs-s.inc: Add hard float profile, arm1176jzfshf, in AVAILTUNES"