transceiver, usrp1: fix transmit gain setting bug
transceiver, usrp1: fix transmit gain setting bug

Transmit gain setting would deceptively set the receive
gain instead. Since transmit attenuation is a combination
of RF gain and digital scaling, this major copy/paste bug
may have gone unnoticed by many users.

Reported-by: Robin Coxe <coxe@close-haul.com>
Signed-off-by: Thomas Tsou <ttsou@vt.edu>

git-svn-id: 504cad4147f1e500be0a169b9f46375eaf875953@3309 19bc5d8c-e614-43d4-8b26-e1612bc8e597

0x7678/openbts-2.8,kheimerl/vbts-openbts,ttsou/openbts-p2.8,ttsou/openbts-p2.8,zabbal/openbts-p2.8,0x7678/openbts-multi-arfcn,ttsou/openbts-p2.8,kheimerl/vbts-openbts,zabbal/openbts-p2.8,fairwaves/openbts-2.8,kheimerl/vbts-openbts,kheimerl/vbts-openbts,0x7678/openbts-multi-arfcn,fairwaves/openbts-2.8,0x7678/openbts-multi-arfcn,0x7678/openbts-2.8,fairwaves/openbts-2.8,ttsou/openbts-p2.8,zabbal/openbts-p2.8,fairwaves/openbts-2.8,ttsou/openbts-p2.8,0x7678/openbts-2.8,0x7678/openbts-2.8,0x7678/openbts-2.8,kheimerl/vbts-openbts,zabbal/openbts-p2.8,fairwaves/openbts-2.8,zabbal/openbts-p2.8,0x7678/openbts-multi-arfcn,0x7678/openbts-multi-arfcn