[POWERPC] ps3: multiplatform build fixes

A few code paths need to check whether or not they are running
on the PS3's LV1 hypervisor before making hcalls. This introduces
a new firmware feature bit for this, FW_FEATURE_PS3_LV1.

Now when both PS3 and IBM_CELL_BLADE are enabled, but not PSERIES,
FW_FEATURE_PS3_LV1 and FW_FEATURE_LPAR get enabled at compile time,
which is a bug. The same problem can also happen for (PPC_ISERIES &&
!PPC_PSERIES && PPC_SOMETHING_ELSE). In order to solve this, I
introduce a new CONFIG_PPC_NATIVE option that is set when at least
one platform is selected that can run without a hypervisor and then
turns the firmware feature check into a run-time option.

The new cell oprofile support that was recently merged does not
work on hypervisor based platforms like the PS3, therefore make
it depend on PPC_CELL_NATIVE instead of PPC_CELL. This may change
if we get oprofile support for PS3.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

arch/powerpc/platforms/ps3/mm.c

@@ -22,6 +22,7 @@
 #include <linux/module.h>
 #include <linux/memory_hotplug.h>
 
+#include <asm/firmware.h>
 #include <asm/lmb.h>
 #include <asm/udbg.h>
 #include <asm/ps3.h>
@@ -293,6 +294,9 @@ static int __init ps3_mm_add_memory(void)
 	unsigned long start_pfn;
 	unsigned long nr_pages;
 
+	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+		return 0;
+
 	BUG_ON(!mem_init_done);
 
 	start_addr = USE_LPAR_ADDR ? map.r1.base : map.rm.size;