Reverts #943

which was trying to fix a HCI error PARAMETER_OUT_OF_MANDATORY_RANGE_ERROR [0x30] raised by a Bluetooth controller when receiving parameters from a CIS creation.

Based on the Spec about LE Set CIG Parameters command:

The PHY_C_To_P[i] parameter identifies which PHY to use for transmission from the
Central to the Peripheral. The Host shall set at least one bit in this parameter and the
Controller shall pick a PHY from the bits that are set.

The PHY_P_To_C[i] parameter identifies which PHY to use for transmission from the
Peripheral to the Central. The Host shall set at least one bit in this parameter and the
Controller shall pick a PHY from the bits that are set.

We should not assign 0 to PHY for any direction even if it's unidirectional CIS on the other direction.

The RTN_C_To_P[i] (Retransmission Number) parameter contains the number of times
that a CIS Data PDU should be retransmitted from the Central to Peripheral before
being acknowledged or flushed (irrespective of which CIS events the retransmission
opportunities occur in). If the CIS is unidirectional from Peripheral to Central, this
parameter shall be ignored. Otherwise, this parameter is a recommendation to the
Controller which the Controller may ignore.

The RTN_P_To_C[i] parameter contains the number of times that a CIS Data PDU
should be retransmitted from the Peripheral to Central before being acknowledged or
flushed (irrespective of which CIS events the retransmission opportunities occur in). If
the CIS is unidirectional from Central to Peripheral, this parameter shall be ignored.
Otherwise, this parameter is a recommendation to the Controller which the Controller
may ignore.

This is ignored when it's unidirectional CIS on the other direction, but that specific controller doesn't satisfy if this is set to zero, but it also needs to set PHY to zero, which doesn't sound right and should file ticket to check with the vendor, instead of putting the wrong fix here.