parisc: Clean up crash header output

On kernel crash, this is the current output:
Kernel Fault: Code=26 (Data memory access rights trap) regs=(ptrval) (Addr=00000004)

Drop the address of regs, it's of no use for debugging, and show the
faulty address without parenthesis.

Signed-off-by: Helge Deller <deller@gmx.de>