keyspan_pda: use request_firmware()

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/firmware/Makefile b/firmware/Makefile
index db1b01a..dd76fa5 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -49,6 +49,8 @@
 	keyspan/usa28.fw keyspan/usa28xa.fw keyspan/usa28xb.fw		\
 	keyspan/usa28x.fw keyspan/usa49w.fw keyspan/usa49wlc.fw
 endif
+fw-shipped-$(CONFIG_USB_SERIAL_KEYSPAN_PDA) += keyspan_pda/keyspan_pda.fw
+fw-shipped-$(CONFIG_USB_SERIAL_XIRCOM) += keyspan_pda/xircom_pgs.fw
 
 fw-shipped-all := $(fw-shipped-y) $(fw-shipped-m) $(fw-shipped-)