arm64: versal: Move common board dtb search

Move the exisiting function of getting board dtb from versal to a common
Xilinx folder.

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/mach-versal/Kconfig

@@ -36,11 +36,6 @@ config COUNTER_FREQUENCY
 config ZYNQ_SDHCI_MAX_FREQ
 	default 200000000
 
-config VERSAL_OF_BOARD_DTB_ADDR
-	hex
-	default 0x1000
-	depends on OF_BOARD
-
 config IOU_SWITCH_DIVISOR0
 	hex "IOU switch divisor0"
 	default 0x20

arch/arm/mach-versal/cpu.c

@@ -108,20 +108,6 @@ int reserve_mmu(void)
 }
 #endif
 
-#if defined(CONFIG_OF_BOARD)
-void *board_fdt_blob_setup(void)
-{
-	static void *fw_dtb = (void *)CONFIG_VERSAL_OF_BOARD_DTB_ADDR;
-
-	if (fdt_magic(fw_dtb) != FDT_MAGIC) {
-		printf("DTB is not passed via %llx\n", (u64)fw_dtb);
-		return NULL;
-	}
-
-	return fw_dtb;
-}
-#endif
-
 int versal_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
 		      u32 arg3, u32 *ret_payload)
 {

board/xilinx/Kconfig

@@ -39,3 +39,10 @@ config XILINX_PS_INIT_FILE
 	     before the build.
 
 endif
+
+config VERSAL_OF_BOARD_DTB_ADDR
+	hex
+	default 0x1000
+	depends on OF_BOARD
+	help
+	  Offset in the memory where the board configuration DTB is placed.

board/xilinx/common/board.c

@@ -36,3 +36,17 @@ int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
 
 	return ret;
 }
+
+#if defined(CONFIG_OF_BOARD)
+void *board_fdt_blob_setup(void)
+{
+	static void *fw_dtb = (void *)CONFIG_VERSAL_OF_BOARD_DTB_ADDR;
+
+	if (fdt_magic(fw_dtb) != FDT_MAGIC) {
+		printf("DTB is not passed via %p\n", fw_dtb);
+		return NULL;
+	}
+
+	return fw_dtb;
+}
+#endif

board/xilinx/versal/Makefile

@@ -5,3 +5,4 @@
 #
 
 obj-y	:= board.o
+obj-y	+= ../common/board.o