staging: sm750fb: rename getChipClock to get_mxclk_freq

The getChipClock is used to detect MXCLK frequency. Make it's name
reflect what the function is actually doing.

Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed