s390x: Rename 'dprintf' to 'DPRINTF'

s390x: Rename 'dprintf' to 'DPRINTF'

'dprintf' is the name of a POSIX standard function so we should not be
stealing it for our debug macro. Rename to 'DPRINTF' (in line with
a number of other source files.)

Signed-off-by: Peter Maydell <[email protected]>
Reviewed-by: Andreas Färber <[email protected]>
Reviewed-by: MORITA Kazutaka <[email protected]>
Acked-by: Richard Henderson <[email protected]>
Acked-by: Kevin Wolf <[email protected]>
Message-id: 1375100199[email protected]
Signed-off-by: Anthony Liguori <[email protected]>