projects/riscv_usb: Add support for the icebreaker-bitsy

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

projects/riscv_usb/data/top-bitsy.pcf

@@ -0,0 +1,26 @@
+# SPI
+set_io -nowarn spi_mosi 14
+set_io -nowarn spi_miso 17
+set_io -nowarn spi_clk 15
+set_io -nowarn spi_flash_cs_n 16
+set_io -nowarn spi_ram_cs_n 37
+
+# USB
+set_io -nowarn usb_dp 43
+set_io -nowarn usb_dn 42
+set_io -nowarn usb_pu 38
+
+# UART
+set_io -nowarn uart_rx 18
+set_io -nowarn uart_tx 19
+
+# Clock
+set_io -nowarn clk_in 35
+
+# Button
+set_io -nowarn btn 10
+
+# Leds
+set_io -nowarn rgb[0] 39
+set_io -nowarn rgb[1] 40
+set_io -nowarn rgb[2] 41