configs: gxbb: Introduce a common config header file

Introduce a meson-gxbb-common.h header file and derive the
configuration for Hardkernel Odroid-C2 board from that.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Acked-by: Beniamino Galvani <b.galvani@gmail.com>
diff --git a/include/configs/odroid-c2.h b/include/configs/odroid-c2.h
index 37a5671..bf5df9c 100644
--- a/include/configs/odroid-c2.h
+++ b/include/configs/odroid-c2.h
@@ -8,44 +8,12 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define CONFIG_CPU_ARMV8
-#define CONFIG_REMAKE_ELF
-#define CONFIG_SYS_CACHELINE_SIZE	64
-#define CONFIG_SYS_NO_FLASH
-#define CONFIG_NR_DRAM_BANKS		1
-#define CONFIG_ENV_IS_NOWHERE		1
-#define CONFIG_ENV_SIZE			0x2000
-#define CONFIG_SYS_MAXARGS		32
-#define CONFIG_SYS_MALLOC_LEN		(32 << 20)
-#define CONFIG_SYS_CBSIZE		1024
-#define CONFIG_MISC_INIT_R
-
-#define CONFIG_SYS_SDRAM_BASE		0
-#define CONFIG_SYS_TEXT_BASE		0x01000000
-#define CONFIG_SYS_INIT_SP_ADDR		0x20000000
-#define CONFIG_SYS_LOAD_ADDR		CONFIG_SYS_TEXT_BASE
-
-/* Generic Interrupt Controller Definitions */
-#define GICD_BASE			0xc4301000
-#define GICC_BASE			0xc4302000
-
 #define CONFIG_IDENT_STRING		" odroid-c2"
 
 /* Serial setup */
 #define CONFIG_CONS_INDEX		0
 #define CONFIG_BAUDRATE			115200
 
-#define CONFIG_CMD_ENV
-
-/* Monitor Command Prompt */
-/* Console I/O Buffer Size */
-#define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
-					sizeof(CONFIG_SYS_PROMPT) + 16)
-#define CONFIG_SYS_HUSH_PARSER
-#define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
-#define CONFIG_SYS_LONGHELP
-#define CONFIG_CMDLINE_EDITING
-
-#include <config_distro_defaults.h>
+#include <configs/meson-gxbb-common.h>
 
 #endif /* __CONFIG_H */