x86, debug printouts: IOMMU setup failures should not be KERN_ERR

The number of BIOSes that have an option to enable the IOMMU, or fix
anything about its configuration, is vanishingly small.  There's no good
reason to punish quiet boot for this.
Signed-off-by: NAdam Jackson <ajax@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/aperture_64.c

@@ -455,11 +455,11 @@ void __init gart_iommu_hole_init(void)
 		   force_iommu ||
 		   valid_agp ||
 		   fallback_aper_force) {
-		printk(KERN_ERR
+		printk(KERN_INFO
 			"Your BIOS doesn't leave a aperture memory hole\n");
-		printk(KERN_ERR
+		printk(KERN_INFO
 			"Please enable the IOMMU option in the BIOS setup\n");
-		printk(KERN_ERR
+		printk(KERN_INFO
 			"This costs you %d MB of RAM\n",
 				32 << fallback_aper_order);
 

include/asm-x86/gart.h

@@ -52,15 +52,15 @@ static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
 		return 0;
 
 	if (aper_base + aper_size > 0x100000000ULL) {
-		printk(KERN_ERR "Aperture beyond 4GB. Ignoring.\n");
+		printk(KERN_INFO "Aperture beyond 4GB. Ignoring.\n");
 		return 0;
 	}
 	if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) {
-		printk(KERN_ERR "Aperture pointing to e820 RAM. Ignoring.\n");
+		printk(KERN_INFO "Aperture pointing to e820 RAM. Ignoring.\n");
 		return 0;
 	}
 	if (aper_size < min_size) {
-		printk(KERN_ERR "Aperture too small (%d MB) than (%d MB)\n",
+		printk(KERN_INFO "Aperture too small (%d MB) than (%d MB)\n",
 				 aper_size>>20, min_size>>20);
 		return 0;
 	}