powerpc: add ps3 platform OS params support

From: Geoff Levand <[email protected]>

Adds support for early access to the parameter data from the PS3 'Other OS' flash memory area. The parameter data mainly holds user preferences like static ip address.

---
 arch/powerpc/platforms/ps3/Makefile  |    2 
 arch/powerpc/platforms/ps3/os-area.c |  259 +++++++++++++++++++++++++++++++++++
 2 files changed, 260 insertions(+), 1 deletion(-)

Index: cell--common--6/arch/powerpc/platforms/ps3/Makefile
===================================================================
@@ -1,2 +1,2 @@
 obj-y += setup.o mm.o smp.o time.o hvcall.o htab.o repository.o
-obj-y += interrupt.o exports.o
+obj-y += interrupt.o exports.o os-area.o