lite5200b_PM: fix compile warning

Fix warning:

icecube.c: In function 'lite5200b_wakeup':
icecube.c:83: warning: format '%08lx' expects type 'long unsigned int', but argument 2 has type 'void (*)(void)'

Signed-off-by: Wolfgang Denk <wd@denx.de>

board/icecube/icecube.c

@@ -80,7 +80,7 @@ void lite5200b_wakeup(void)
 	/* jump back to linux kernel code */
 	linux_wakeup = SAVED_ADDR;
 	printf("\n\nLooks like we just woke, transferring control to 0x%08lx\n",
-			linux_wakeup);
+			(unsigned long)linux_wakeup);
 	linux_wakeup();
 }
 #else