mpc8548cds: Rework CONFIG_LEGACY usage

This CONFIG option is used in one place, so pick a more direct name and
migrate to Kconfig.  Rework the code slightly.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

board/freescale/common/cds_via.c

@@ -28,7 +28,11 @@ void mpc85xx_config_via(struct pci_controller *hose,
 	 * This allows legacy I/O (i8259, etc) on the VIA
 	 * southbridge to be accessed.
 	 */
-	bridge = PCI_BDF(0,BRIDGE_ID,0);
+#ifdef CONFIG_TARGET_MPC8548CDS_LEGACY
+	bridge = PCI_BDF(0, 17, 0);
+#else
+	bridge = PCI_BDF(0, 28, 0);
+#endif
 	pci_hose_write_config_byte(hose, bridge, PCI_IO_BASE, 0);
 	pci_hose_write_config_word(hose, bridge, PCI_IO_BASE_UPPER16, 0);
 	pci_hose_write_config_byte(hose, bridge, PCI_IO_LIMIT, 0x10);

board/freescale/mpc8548cds/Kconfig

@@ -9,4 +9,7 @@ config SYS_VENDOR
 config SYS_CONFIG_NAME
 	default "MPC8548CDS"
 
+config TARGET_MPC8548CDS_LEGACY
+	bool "Legacy platform support"
+
 endif

configs/MPC8548CDS_legacy_defconfig

@@ -8,9 +8,9 @@ CONFIG_MPC85xx=y
 # CONFIG_CMD_ERRATA is not set
 CONFIG_TARGET_MPC8548CDS=y
 CONFIG_MPC85XX_HAVE_RESET_VECTOR=y
+CONFIG_TARGET_MPC8548CDS_LEGACY=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="LEGACY"
 CONFIG_DYNAMIC_SYS_CLK_FREQ=y
 CONFIG_BOOTDELAY=10
 CONFIG_USE_BOOTCOMMAND=y

include/configs/MPC8548CDS.h

@@ -324,14 +324,6 @@
 #endif
 #define CONFIG_SYS_SRIO1_MEM_SIZE	0x20000000	/* 512M */
 
-#ifdef CONFIG_LEGACY
-#define BRIDGE_ID 17
-#define VIA_ID 2
-#else
-#define BRIDGE_ID 28
-#define VIA_ID 4
-#endif
-
 #if defined(CONFIG_PCI)
 #define CONFIG_PCI_SCAN_SHOW		/* show pci devices on startup */
 #endif	/* CONFIG_PCI */