ARM: phytec: pcm051: Remove unneeded CONFIG_USE_IRQ

The config for pcm051 still undef'd CONFIG_USE_IRQ. This is not
needed any more since it is not defined in the whole include path
before.

Signed-off-by: Lars Poeschel <poeschel@lemonage.de>

include/configs/pcm051.h

@@ -163,9 +163,6 @@
 #define CONFIG_USB_ETH_RNDIS
 #endif /* CONFIG_MUSB_GADGET */
 
-/* Unsupported features */
-#undef CONFIG_USE_IRQ
-
 #define CONFIG_NET_MULTI
 #define CONFIG_PHY_GIGE
 #define CONFIG_PHYLIB