sysmobts-vty: Fix compiler warnings about the clock value
sysmobts-vty: Fix compiler warnings about the clock value

The first one just sets the val to 0xffff, the second converted
the value to integer twice.

sysmobts_vty.c: In function ‘cfg_trx_clkcal_def’:
sysmobts_vty.c:109:15: warning: unused variable ‘clkcal’ [-Wunused-variable]
sysmobts_vty.c: In function ‘cfg_trx_clkcal’:
sysmobts_vty.c:122:15: warning: unused variable ‘clkcal’ [-Wunused-variable]

shimaore/osmo-bts,tacooper/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,tacooper/osmo-bts