lib/fatfs/option/ccsbcs: Follow uPy optional features model.

Don't error out when options is not what you support, just skip your code.
This allows to make FatFs support properly configurable.

lib/fatfs/option/ccsbcs.c

@@ -493,10 +493,7 @@ const WCHAR Tbl[] = {	/*  CP1258(0x80-0xFF) to Unicode conversion table */
 #endif
 
 
-#if !_TBLDEF || !_USE_LFN
-#error This file is not needed in current configuration. Remove from the project.
-#endif
-
+#if _TBLDEF && _USE_LFN
 
 WCHAR ff_convert (	/* Converted character, Returns zero on error */
 	WCHAR	chr,	/* Character code to be converted */
@@ -571,3 +568,5 @@ WCHAR ff_wtoupper (	/* Upper converted character */
 
     return tbl_lower[i] ? tbl_upper[i] : chr;
 }
+
+#endif