i2c: disable its usage on Cora Z7-10

experiments/src/main.rs

@@ -205,6 +205,8 @@ pub fn main_core0() {
     }
     
     // Test I2C
+    #[cfg(feature = "target_zc706")]
+    {
         let mut i2c = zynq::i2c::I2C::i2c();
         i2c.init();
         println!("I2C bit-banging enabled");
@@ -233,6 +235,7 @@ pub fn main_core0() {
             print!("{:02x} ", eeprom_buffer[i]);
         }
         println!("");
+    }
 
     let eth = zynq::eth::Eth::default(HWADDR.clone());
     println!("Eth on");

libboard_zynq/src/lib.rs

@@ -20,6 +20,7 @@ pub mod flash;
 pub mod time;
 pub mod timer;
 pub mod sdio;
+#[cfg(feature = "target_zc706")]
 pub mod i2c;
 pub mod logger;
 pub mod ps7_init;