media: qt1010: fix bogus warnings

The logic at qt1010_init_meas1() and qt1010_init_meas2()
are too complex for static analizers to identify that
some vars are always be initialized.

That causes smatch to produce the following warnings:
	drivers/media/tuners/qt1010.c:248 qt1010_init_meas1() error: uninitialized symbol 'val2'.
	drivers/media/tuners/qt1010.c:282 qt1010_init_meas2() error: uninitialized symbol 'val'.

So, add annotations to prevent those bogus warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/tuners/qt1010.c

@@ -224,7 +224,7 @@ static int qt1010_set_params(struct dvb_frontend *fe)
 static int qt1010_init_meas1(struct qt1010_priv *priv,
 			     u8 oper, u8 reg, u8 reg_init_val, u8 *retval)
 {
-	u8 i, val1, val2;
+	u8 i, val1, uninitialized_var(val2);
 	int err;
 
 	qt1010_i2c_oper_t i2c_data[] = {
@@ -259,7 +259,7 @@ static int qt1010_init_meas1(struct qt1010_priv *priv,
 static int qt1010_init_meas2(struct qt1010_priv *priv,
 			    u8 reg_init_val, u8 *retval)
 {
-	u8 i, val;
+	u8 i, uninitialized_var(val);
 	int err;
 	qt1010_i2c_oper_t i2c_data[] = {
 		{ QT1010_WR, 0x07, reg_init_val },