nds32: Remove the architecture

As removal of nds32 has been ack'd for the Linux kernel, remove support
here as well.

Cc: Rick Chen <rick@andestech.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/lib/Kconfig b/lib/Kconfig
index effe735..858be14 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -861,7 +861,7 @@
 
 config LMB
 	bool "Enable the logical memory blocks library (lmb)"
-	default y if ARC || ARM || M68K || MICROBLAZE || MIPS || NDS32 || \
+	default y if ARC || ARM || M68K || MICROBLAZE || MIPS || \
 		     NIOS2 || PPC || RISCV || SANDBOX || SH || X86 || XTENSA
 	help
 	  Support the library logical memory blocks.