ARM: mach-sa1100: Fix for compiler warning of uninitialized variable.

This is a fix for the compiler warning: 'new_ppcr' may be used
uninitialized in this function.
Signed-off-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>