alpha: Fix build error without CONFIG_VGA_HOSE.

pci_vga_hose is #defined to 0 in include/asm/vga.h if CONFIG_VGA_HOSE is
not set.
Signed-off-by: Matt Turner <mattst88@gmail.com>

arch/alpha/kernel/core_marvel.c

@@ -369,6 +369,7 @@ marvel_io7_present(gct6_node *node)
 static void __init
 marvel_find_console_vga_hose(void)
 {
+#ifdef CONFIG_VGA_HOSE
 	u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
 
 	if (pu64[7] == 3) {	/* TERM_TYPE == graphics */
@@ -402,6 +403,7 @@ marvel_find_console_vga_hose(void)
 			pci_vga_hose = hose;
 		}
 	}
+#endif
 }
 
 gct6_search_struct gct_wanted_node_list[] = {

arch/alpha/kernel/core_titan.c

@@ -461,6 +461,7 @@ titan_ioremap(unsigned long addr, unsigned long size)
 	unsigned long *ptes;
 	unsigned long pfn;
 
+#ifdef CONFIG_VGA_HOSE
 	/*
 	 * Adjust the address and hose, if necessary.
 	 */ 
@@ -468,6 +469,7 @@ titan_ioremap(unsigned long addr, unsigned long size)
 		h = pci_vga_hose->index;
 		addr += pci_vga_hose->mem_space->start;
 	}
+#endif
 
 	/*
 	 * Find the hose.