i2c: hix5hd2: add COMPILE_TEST

Commit 9439eb3a ("asm-generic: io: implement relaxed
accessor macros as conditional wrappers") has added
{read,write}{b,w,l,q}_relaxed to include/asm-generic/io.h.
So COMPILE_TEST can be added.
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/Kconfig

@@ -79,7 +79,7 @@ config I2C_AMD8111
 
 config I2C_HIX5HD2
 	tristate "Hix5hd2 high-speed I2C driver"
-	depends on ARCH_HIX5HD2
+	depends on ARCH_HIX5HD2 || COMPILE_TEST
 	help
 	  Say Y here to include support for high-speed I2C controller in the
 	  Hisilicon based hix5hd2 SoCs.