s390/dumpstack: convert print_symbol to %pSR
s390/dumpstack: convert print_symbol to %pSR

This is the same as what other architectures did.
The change has also the advantage that there won't be any interleaving
messages between printk() and print_symbol().

Signed-off-by: Heiko Carstens <8dcf0f69152f32f23184f83357a3731522e56b9c@de.ibm.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs