xilinx_mbv: Remove empty config header

Now that we support having CONFIG_SYS_CONFIG_NAME be unset to indicate a
lack of board.h file, unset this on the xilinx_mbv platforms and remove
the otherwise empty file.

Signed-off-by: Tom Rini <trini@konsulko.com>
---
Cc: Michal Simek <michal.simek@amd.com>
diff --git a/board/xilinx/mbv/Kconfig b/board/xilinx/mbv/Kconfig
index 4bc9f72..d2dec39 100644
--- a/board/xilinx/mbv/Kconfig
+++ b/board/xilinx/mbv/Kconfig
@@ -9,9 +9,6 @@
 config SYS_CPU
 	default "generic"
 
-config SYS_CONFIG_NAME
-	default "xilinx_mbv"
-
 config TEXT_BASE
 	default 0x80000000 if !RISCV_SMODE
 	default 0x80400000 if RISCV_SMODE && ARCH_RV32I
diff --git a/include/configs/xilinx_mbv.h b/include/configs/xilinx_mbv.h
deleted file mode 100644
index dba398a..0000000
--- a/include/configs/xilinx_mbv.h
+++ /dev/null
@@ -1,6 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * (C) Copyright 2023, Advanced Micro Devices, Inc.
- *
- * Michal Simek <michal.simek@amd.com>
- */