target-tilegx: Fix LDNA_ADD_IMM8_OPCODE_X1

An obvious typo in the mnemonic here.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRichard Henderson <rth@twiddle.net>

target-tilegx/opcode_tilegx.h

@@ -1015,7 +1015,7 @@ enum
   LD_UNARY_OPCODE_X1 = 29,
   LNK_UNARY_OPCODE_X1 = 30,
   LNK_UNARY_OPCODE_Y1 = 14,
-  LWNA_ADD_IMM8_OPCODE_X1 = 21,
+  LDNA_ADD_IMM8_OPCODE_X1 = 21,
   MFSPR_IMM8_OPCODE_X1 = 22,
   MF_UNARY_OPCODE_X1 = 31,
   MM_BF_OPCODE_X0 = 7,