Add a function similar to print_size() that works for frequencies. It can
handle from Hz to GHz.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Before adding one more function, create a separate header to help reduce
the size of common.h. Add the missing function comments and tidy up.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>