MIPS: INCA-IP: rename inca-swap-bytes host tool

The INCA-IP SoC belongs to the Lantiq XWAY SoC product portfolio.
For the upcoming support of other Lantiq SoC devices this tool should
not solely depend on the INCA-IP board.

Rename the tool to xway-swap-bytes and add an config option
to enable compilation optionally.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Acked-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
diff --git a/include/configs/incaip.h b/include/configs/incaip.h
index f2950e8..57eb2fa 100644
--- a/include/configs/incaip.h
+++ b/include/configs/incaip.h
@@ -31,6 +31,8 @@
 #define CONFIG_MIPS32		1	/* MIPS 4Kc CPU core	*/
 #define CONFIG_INCA_IP		1	/* on a INCA-IP Board	*/
 
+#define CONFIG_XWAY_SWAP_BYTES
+
 /*
  * Clock for the MIPS core (MHz)
  * allowed values: 100000000, 133000000, and 150000000 (default)