iio: Remove a cast in iio-test-format which is no longer required

KUnit's EXPECT macros no longer typecheck as stringently, so casting the
result of strcmp() is now unnecessary.
Signed-off-by: NDavid Gow <davidgow@google.com>
Reviewed-by: NBrendan Higgins <brendanhiggins@google.com>
Acked-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NShuah Khan <skhan@linuxfoundation.org>

drivers/iio/test/iio-test-format.c

@@ -8,7 +8,7 @@
 #include <linux/iio/iio.h>
 
 #define IIO_TEST_FORMAT_EXPECT_EQ(_test, _buf, _ret, _val) do { \
-		KUNIT_EXPECT_EQ(_test, (int)strlen(_buf), _ret); \
+		KUNIT_EXPECT_EQ(_test, strlen(_buf), _ret); \
 		KUNIT_EXPECT_STREQ(_test, (_buf), (_val)); \
 	} while (0)