[AVR32] Get rid of board_setup_fbmem()

Since the core setup code takes care of both allocation and
reservation of framebuffer memory, there's no need for this board-
specific hook anymore. Replace it with two global variables,
fbmem_start and fbmem_size, which can be used directly.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
diff --git a/include/asm-avr32/setup.h b/include/asm-avr32/setup.h
index bca2ee1..1ff1a21 100644
--- a/include/asm-avr32/setup.h
+++ b/include/asm-avr32/setup.h
@@ -126,10 +126,10 @@
 
 extern struct tag *bootloader_tags;
 
+extern resource_size_t fbmem_start;
+extern resource_size_t fbmem_size;
 
 void setup_processor(void);
-extern void board_setup_fbmem(unsigned long fbmem_start,
-			      unsigned long fbmem_size);
 
 #endif /* !__ASSEMBLY__ */