tty: xuartps: disable clocks when not used

Currently the clocks are enabled at probe and disabled
at remove. Instead enable the clocks when used.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed