Fix USRP1 build with support for setting Rx/TxAntenna

The USRP1 build was broken by commit 77ce99ac6720896f504a0581a5c57b2929a13cef.

Commit 77ce99ac6720896f504a0581a5c57b2929a13cef broke the USRP1 build

Change-Id: I28585947d5662cdd580a814cce54a5d9aa30eeb8
(cherry picked from commit 3f52f0e6c5d384f25ff8583648e5e4a4dc957530)
1 file changed