VIRT-PHY: Added test option for fast hyperframe repeat.
VIRT-PHY: Added test option for fast hyperframe repeat.

Frame number will restart at 0 after each superframe (approx. 6.1 sec)
if enabled. Can be enabled by preprocessor define.

Change-Id: If3adf14df5fcd8daf53363c27b3772c42d7122e9

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts