spi/coldfire-qspi: Drop extra calls to spi_master_get in suspend/resume functions

Suspend and resume functions call spi_master_get() without matching
spi_master_put(). The extra references are unnecessary and cause
subsequent module unload attempts to fail, so drop the calls.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>