kaweth: use request_firmware()

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/firmware/kaweth/trigger_code_fix.bin.ihex b/firmware/kaweth/trigger_code_fix.bin.ihex
new file mode 100644
index 0000000..7712f73
--- /dev/null
+++ b/firmware/kaweth/trigger_code_fix.bin.ihex
@@ -0,0 +1,3 @@
+:10000000B6C3AABBCCDD0200060018003E0080008B
+:060010009800AA000000A8
+:00000001FF