[AGPGART] fix compile errors

This fixes the following compile failures of agpgart drivers.
These errors were inserted by the recent AGPGART constification patch.

drivers/char/agp/uninorth-agp.c:492: error: expected '{' before 'const'
drivers/char/agp/uninorth-agp.c:517: error: expected '{' before 'const'
drivers/char/agp/uninorth-agp.c: In function 'agp_uninorth_probe':
drivers/char/agp/uninorth-agp.c:634: error: 'u3_agp_driver' undeclared (first use in this function)
drivers/char/agp/uninorth-agp.c:634: error: (Each undeclared identifier is reported only once
drivers/char/agp/uninorth-agp.c:634: error: for each function it appears in.)
drivers/char/agp/uninorth-agp.c:636: error: 'uninorth_agp_driver' undeclared (first use in this function)

Signed-off-by: Ryusuke Konishi <ryusuke@osrg.net>
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/char/agp/hp-agp.c

@@ -419,7 +419,7 @@ hp_zx1_enable (struct agp_bridge_data *bridge, u32 mode)
 	agp_device_command(command, (mode & AGP8X_MODE) != 0);
 }
 
-struct const agp_bridge_driver hp_zx1_driver = {
+const struct agp_bridge_driver hp_zx1_driver = {
 	.owner			= THIS_MODULE,
 	.size_type		= FIXED_APER_SIZE,
 	.configure		= hp_zx1_configure,

drivers/char/agp/i460-agp.c

@@ -550,7 +550,7 @@ static unsigned long i460_mask_memory (struct agp_bridge_data *bridge,
 		| (((addr & ~((1 << I460_IO_PAGE_SHIFT) - 1)) & 0xfffff000) >> 12);
 }
 
-struct const agp_bridge_driver intel_i460_driver = {
+const struct agp_bridge_driver intel_i460_driver = {
 	.owner			= THIS_MODULE,
 	.aperture_sizes		= i460_sizes,
 	.size_type		= U8_APER_SIZE,

drivers/char/agp/sgi-agp.c

@@ -247,7 +247,7 @@ static struct agp_bridge_data *sgi_tioca_find_bridge(struct pci_dev *pdev)
 	return bridge;
 }
 
-struct const agp_bridge_driver sgi_tioca_driver = {
+const struct agp_bridge_driver sgi_tioca_driver = {
 	.owner = THIS_MODULE,
 	.size_type = U16_APER_SIZE,
 	.configure = sgi_tioca_configure,

drivers/char/agp/uninorth-agp.c

@@ -489,7 +489,7 @@ static const struct aper_size_info_32 u3_sizes[8] =
 	{4, 1024, 0, 1}
 };
 
-struct const agp_bridge_driver uninorth_agp_driver = {
+const struct agp_bridge_driver uninorth_agp_driver = {
 	.owner			= THIS_MODULE,
 	.aperture_sizes		= (void *)uninorth_sizes,
 	.size_type		= U32_APER_SIZE,
@@ -514,7 +514,7 @@ struct const agp_bridge_driver uninorth_agp_driver = {
 	.cant_use_aperture	= 1,
 };
 
-struct const agp_bridge_driver u3_agp_driver = {
+const struct agp_bridge_driver u3_agp_driver = {
 	.owner			= THIS_MODULE,
 	.aperture_sizes		= (void *)u3_sizes,
 	.size_type		= U32_APER_SIZE,