Remove Code in psb_drb.h

[nick]

Greetings again David and other maintainers,
I am wondering if I can remove the following code below my message in psb_drv.h 
as you state it's unneeded in a TODO.
Cheers Nick 
/* TODO: To get rid of */
#define PSB_TT_PRIV0_LIMIT       (256*1024*1024)
#define PSB_TT_PRIV0_PLIMIT      (PSB_TT_PRIV0_LIMIT >> PAGE_SHIFT)