ppc: Use the indirect_pci.c from arch/powerpc/sysdev

This defines a CONFIG_INDIRECT_PCI symbol to control whether it
gets used or not, and fixes the Kconfig to select that symbol for
platforms that need it.

Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/embedded6xx/Kconfig

@@ -27,6 +27,7 @@ config CHESTNUT
 
 config SPRUCE
 	bool "IBM-Spruce"
+	select PPC_INDIRECT_PCI
 
 config HDPU
 	bool "Sky-HDPU"
@@ -50,15 +51,19 @@ config LOPEC
 
 config MVME5100
 	bool "Motorola-MVME5100"
+	select PPC_INDIRECT_PCI
 
 config PPLUS
 	bool "Motorola-PowerPlus"
+	select PPC_INDIRECT_PCI
 
 config PRPMC750
 	bool "Motorola-PrPMC750"
+	select PPC_INDIRECT_PCI
 
 config PRPMC800
 	bool "Motorola-PrPMC800"
+	select PPC_INDIRECT_PCI
 
 config SANDPOINT
 	bool "Motorola-Sandpoint"
@@ -74,6 +79,7 @@ config PAL4
 
 config GEMINI
 	bool "Synergy-Gemini"
+	select PPC_INDIRECT_PCI
 	depends on BROKEN
 	help
 	  Select Gemini if configuring for a Synergy Microsystems' Gemini
@@ -226,6 +232,7 @@ config MV64360		# Really MV64360 & MV64460
 config MV64X60
 	bool
 	depends on (GT64260 || MV64360)
+	select PPC_INDIRECT_PCI
 	default y
 
 menu "Set bridge options"
@@ -274,6 +281,7 @@ config EPIC_SERIAL_MODE
 config MPC10X_BRIDGE
 	bool
 	depends on POWERPMC250 || LOPEC || SANDPOINT
+	select PPC_INDIRECT_PCI
 	default y
 
 config MPC10X_OPENPIC