powerpc/oops: Print CR/XER on same line as MSR

Somehow we missed this when the pr_cont() changes went in. Fix CR/XER
to go on the same line as MSR, as they have historically, eg:

  MSR: 8000000000009032 <SF,EE,ME,IR,DR,RI>  CR: 4804408a  XER: 20000000

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>