i2c: algo-bit: declare i2c_bit_quirk_no_clk_stretch as static

i2c_bit_quirk_no_clk_stretch is used in i2c-algo-bit.c only, so
declare it as static.

Signed-off-by: Michele Curti <[e-mail]>
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/algos/i2c-algo-bit.c

···
 };
 EXPORT_SYMBOL(i2c_bit_algo);
 
-const struct i2c_adapter_quirks i2c_bit_quirk_no_clk_stretch = {
+static const struct i2c_adapter_quirks i2c_bit_quirk_no_clk_stretch = {
 	.flags = I2C_AQ_NO_CLK_STRETCH,
 };