powerpc: Merge 32-bit CHRP support.

SMP still needs more work but UP gets as far as starting userspace
at least.  This uses the 64-bit-style code for spinning up the cpus.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 964ded4..9589d621 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -339,7 +339,7 @@
 	default n
 
 config MPIC
-	depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
+	depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE || PPC_CHRP
 	bool
 	default y