arm: mvebu: db-88f6820-gp: Enable PCI support

This patch enabled the MVEBU PCIe support on the db-88f6820-gp A38x
eval board. It also enabled the Intel E1000 driver support and
adds the initialization of PCIe network controllers to the
board code.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Anton Schubert <anton.schubert@gmx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Dirk Eibach <eibach@gdsys.de>

board/Marvell/db-88f6820-gp/db-88f6820-gp.c

@@ -7,6 +7,7 @@
 #include <common.h>
 #include <i2c.h>
 #include <miiphy.h>
+#include <netdev.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/soc.h>
@@ -130,3 +131,9 @@ int checkboard(void)
 
 	return 0;
 }
+
+int board_eth_init(bd_t *bis)
+{
+	cpu_eth_init(bis); /* Built in controller(s) come first */
+	return pci_eth_init(bis);
+}

include/configs/db-88f6820-gp.h

@@ -41,6 +41,7 @@
 #define CONFIG_CMD_FS_GENERIC
 #define CONFIG_CMD_I2C
 #define CONFIG_CMD_MMC
+#define CONFIG_CMD_PCI
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_SCSI
 #define CONFIG_CMD_SF
@@ -106,6 +107,13 @@
 #define CONFIG_SYS_NETA_INTERFACE_TYPE	PHY_INTERFACE_MODE_RGMII
 #define PHY_ANEG_TIMEOUT	8000	/* PHY needs a longer aneg time */
 
+/* PCIe support */
+#define CONFIG_PCI
+#define CONFIG_PCI_MVEBU
+#define CONFIG_PCI_PNP
+#define CONFIG_PCI_SCAN_SHOW
+#define CONFIG_E1000	/* enable Intel E1000 support for testing */
+
 #define CONFIG_SYS_CONSOLE_INFO_QUIET	/* don't print console @ startup */
 #define CONFIG_SYS_ALT_MEMTEST