icE1usb fw: Expose the ticks from multiple E1 ports in misc.{c,h}

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I4dfdeecb6d3a25025095cd017ebbf74aee41c8b2
diff --git a/firmware/ice40-riscv/icE1usb/misc.h b/firmware/ice40-riscv/icE1usb/misc.h
index 69c0da7..dac5730 100644
--- a/firmware/ice40-riscv/icE1usb/misc.h
+++ b/firmware/ice40-riscv/icE1usb/misc.h
@@ -27,6 +27,6 @@
 void pdm_set(int chan, bool enable, unsigned value, bool normalize);
 
 void e1_led_set(bool enable, uint8_t cfg);
-uint16_t e1_tick_read(void);
+uint16_t e1_tick_read(int port);
 
 void reboot(int fw);