powerpc: ppc4xx: convert AMCC boards to generic board

Add CONFIG_SYS_GENERIC_BOARD to amcc-common.h and CONFIG_DISPLAY_BOARDINFO
to Kconfig files. canyonlands.h includes amcc-common.h, so remove
CONFIG_SYS_GENERIC_BOARD definition there.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Feng Kan <fkan@amcc.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/amcc-common.h b/include/configs/amcc-common.h
index 73e1b0a..d5b6e37 100644
--- a/include/configs/amcc-common.h
+++ b/include/configs/amcc-common.h
@@ -10,6 +10,8 @@
 #ifndef __AMCC_COMMON_H
 #define __AMCC_COMMON_H
 
+#define CONFIG_SYS_GENERIC_BOARD
+
 #define CONFIG_SYS_SDRAM_BASE		0x00000000	/* _must_ be 0		*/
 #define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* Start of U-Boot	*/
 #define CONFIG_SYS_MONITOR_LEN		(0xFFFFFFFF - CONFIG_SYS_MONITOR_BASE + 1)