staging: vt6655: baseband add new function vnt_get_phy_field

This is a replacement for BBvCalculateParameter for getting
the phy fields via struct vnt_phy_field

This is a direct copy from the vt6656 driver.

BBvCalculateParameter will removed later.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>