[POWERPC] disallow building powermac and tsi108 without PCI

The TSI108 code and the 32 bit powermac and chrp platforms
have dependency on PCI that is not easy or desirable to get rid
of.

The easiest fix is to always select CONFIG_PCI if one of those
platforms is enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/powerpc/platforms/chrp/Kconfig b/arch/powerpc/platforms/chrp/Kconfig
index d2c6905..22b4b4e 100644
--- a/arch/powerpc/platforms/chrp/Kconfig
+++ b/arch/powerpc/platforms/chrp/Kconfig
@@ -8,4 +8,5 @@
 	select PPC_MPC106
 	select PPC_UDBG_16550
 	select PPC_NATIVE
+	select PCI
 	default y