WAN: Port COSA driver to generic HDLC.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

drivers/net/wan/Kconfig

@@ -37,7 +37,7 @@ config HOSTESS_SV11
 # The COSA/SRP driver has not been tested as non-modular yet.
 config COSA
 	tristate "COSA/SRP sync serial boards support"
-	depends on ISA && m && ISA_DMA_API
+	depends on ISA && m && ISA_DMA_API && HDLC
 	---help---
 	  Driver for COSA and SRP synchronous serial boards.