m68k: add generic-board support

Add generic-board support for the m68k architecture.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
diff --git a/arch/m68k/config.mk b/arch/m68k/config.mk
index 3b3a7e8..a629b68 100644
--- a/arch/m68k/config.mk
+++ b/arch/m68k/config.mk
@@ -11,6 +11,9 @@
 
 CONFIG_STANDALONE_LOAD_ADDR ?= 0x20000
 
+# Support generic board on m68k
+__HAVE_ARCH_GENERIC_BOARD := y
+
 PLATFORM_CPPFLAGS += -D__M68K__
 PLATFORM_LDFLAGS  += -n
 PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
diff --git a/arch/m68k/include/asm/config.h b/arch/m68k/include/asm/config.h
index 9c4d3fb..7590842 100644
--- a/arch/m68k/include/asm/config.h
+++ b/arch/m68k/include/asm/config.h
@@ -7,6 +7,9 @@
 #ifndef _ASM_CONFIG_H_
 #define _ASM_CONFIG_H_
 
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_SYS_GENERIC_GLOBAL_DATA
+
 #define CONFIG_NEEDS_MANUAL_RELOC
 
 #define CONFIG_LMB
diff --git a/arch/m68k/include/asm/u-boot.h b/arch/m68k/include/asm/u-boot.h
index 983cb2d..911c0d3 100644
--- a/arch/m68k/include/asm/u-boot.h
+++ b/arch/m68k/include/asm/u-boot.h
@@ -20,6 +20,11 @@
  * include/asm-ppc/u-boot.h
  */
 
+#ifdef CONFIG_SYS_GENERIC_BOARD
+/* Use the generic board which requires a unified bd_info */
+#include <asm-generic/u-boot.h>
+#else
+
 #ifndef __ASSEMBLY__
 
 typedef struct bd_info {
@@ -48,6 +53,9 @@
 
 #endif				/* __ASSEMBLY__ */
 
+#endif				/* !CONFIG_SYS_GENERIC_BOARD */
+
+
 /* For image.h:image_check_target_arch() */
 #define IH_ARCH_DEFAULT IH_ARCH_M68K
 
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile
index 65867d6..d0e1a84 100644
--- a/arch/m68k/lib/Makefile
+++ b/arch/m68k/lib/Makefile
@@ -5,7 +5,9 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y	+= board.o
+ifndef CONFIG_SYS_GENERIC_BOARD
+obj-y   += board.o
+endif
 obj-$(CONFIG_CMD_BOOTM) += bootm.o
 obj-y	+= cache.o
 obj-y	+= interrupts.o