dib7000p: constify i2c_algorithm structure

Check for i2c_algorithm structures that are only stored in the algo field of an i2c_adapter structure. This field is declared const, so i2c_algorithm structures that have this property can be declared as const also.

This issue was identified using Coccinelle and the following semantic patch:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct i2c_algorithm i@p = { ... };

@ok@
identifier r.i;
struct i2c_adapter e;
position p;
@@
e.algo = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct i2c_algorithm i = { ... };

---
 drivers/media/dvb-frontends/dib7000p.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 1caa04d..0fbaabe 100644
@@ -2388,7 +2388,7 @@ static u32 dib7000p_i2c_func(struct i2c_adapter *adapter)
 	return I2C_FUNC_I2C;
 }
 
-static struct i2c_algorithm dib7090_tuner_xfer_algo = {
+static const struct i2c_algorithm dib7090_tuner_xfer_algo = {
 	.master_xfer = dib7090_tuner_xfer,
 	.functionality = dib7000p_i2c_func,
 };

2.5.0