ARM: dts: Turn ULCB into Multi-DTB config

Bundle DTBs for R8A7795, R8A7796 ULCB variants into single U-Boot
build and let U-Boot choose between them based on the CPU model.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

board/renesas/ulcb/ulcb.c

@@ -82,3 +82,21 @@ int dram_init_banksize(void)
 
 	return 0;
 }
+
+#ifdef CONFIG_MULTI_DTB_FIT
+int board_fit_config_name_match(const char *name)
+{
+	/* PRR driver is not available yet */
+	u32 cpu_type = rmobile_get_cpu_type();
+
+	if ((cpu_type == RMOBILE_CPU_TYPE_R8A7795) &&
+	    !strcmp(name, "r8a7795-h3ulcb-u-boot"))
+		return 0;
+
+	if ((cpu_type == RMOBILE_CPU_TYPE_R8A7796) &&
+	    !strcmp(name, "r8a7796-m3ulcb-u-boot"))
+		return 0;
+
+	return -1;
+}
+#endif

configs/r8a7795_ulcb_defconfig

@@ -28,6 +28,8 @@ CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="r8a7795-h3ulcb-u-boot"
+CONFIG_OF_LIST="r8a7795-h3ulcb-u-boot r8a7796-m3ulcb-u-boot"
+CONFIG_MULTI_DTB_FIT=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y

configs/r8a7796_ulcb_defconfig

@@ -29,6 +29,8 @@ CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
 CONFIG_DEFAULT_DEVICE_TREE="r8a7796-m3ulcb-u-boot"
+CONFIG_OF_LIST="r8a7795-h3ulcb-u-boot r8a7796-m3ulcb-u-boot"
+CONFIG_MULTI_DTB_FIT=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y