[rdkb][common][hal][Fix get channel bandwidth fail issue]

[Description]
Fix get channel bandwidth fail issue
1. When bandwidth is 160, the content of buf is 160MHz. So strcmp(buf,"160") will not
equal zero

[Release-log]

1 file changed
tree: 64bc93ffb7f36216f72c527f6b2bd7dad7efba89
  1. src/