binman: Use a unique number for the symbols test file

Two test devicetree files currently have 192 as their unique number. Fix
this by separating them out.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index 81c213a..3444955 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -1377,7 +1377,7 @@
 
     def testSymbolsNoDtb(self):
         """Test binman can assign symbols embedded in U-Boot SPL"""
-        self.checkSymbols('192_symbols_nodtb.dts',
+        self.checkSymbols('196_symbols_nodtb.dts',
                           U_BOOT_SPL_NODTB_DATA + U_BOOT_SPL_DTB_DATA,
                           0x38)
 
diff --git a/tools/binman/test/192_symbols_nodtb.dts b/tools/binman/test/196_symbols_nodtb.dts
similarity index 100%
rename from tools/binman/test/192_symbols_nodtb.dts
rename to tools/binman/test/196_symbols_nodtb.dts