a wee bug in online help file for bladeRF-cli

[jdsahr]

The online help file for bladeRF-cli contains the following line:

 "The n, samples, buffers, and xfers parameters support the suffixes K, M, and G, which are multiples of 1024."

This is not (technically) incorrect, but it would be more precise to say that K, M, and G are integer powers of 1024, i.e.

   1024, 
   1024^2, 
   1024^3