Remove use of deprecated rprint functions

For each of the rprint functions, there is a corresponding gen_print function
that can be used instead.

Change-Id: I89c6e0b63cac7aee92da7dc7945e413001287967
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/systest/proc_turbo_freq_check.robot b/systest/proc_turbo_freq_check.robot
index 8f140e3..30c9247 100755
--- a/systest/proc_turbo_freq_check.robot
+++ b/systest/proc_turbo_freq_check.robot
@@ -41,7 +41,7 @@
     REST Power On  stack_mode=normal
     ${proc_speed_turbo}=  Get CPU Max Frequency
 
-    Rprintn
+    Printn
     Rpvars   proc_speed_non_turbo  proc_speed_turbo
 
     ${err_msg}=  Catenate  Reported turbo processor speed should be