serial: 8250: Fix define for conditional compilation
Created by: linosanfilippo-kunbus
The define CONFIG_PREEMPT_RT_FULL is used to switch from non-sleepable to sleepable gpio access in realtime kernels. However this macro does not exist any more so the switch has not effect and also for realtime kernels the non-sleepable gpio access is used. Fix this by using the correct define for newer kernels.
Signed-off-by: Lino Sanfilippo l.sanfilippo@kunbus.com