intelfb: update doc and Kconfig (supported devices)

According to drivers/video/intelfb/intelfb.h, the intelfb driver
supportes the following devices:
830M/845G/852GM/855GM/865G/915G/915GM/945G/945GM. So the description in
drivers/video/Kconfig and the documentation in
Documentation/fb/intelfb.txt is outdated.

airlied: cleaned up some other obvious mistakes in intelfb.txt.

Signed-off-by: Christian Merkle <mail@christian-merkle.de>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 743c853..60c6773 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -805,7 +805,7 @@
 	help
 
 config FB_INTEL
-	tristate "Intel 830M/845G/852GM/855GM/865G support (EXPERIMENTAL)"
+	tristate "Intel 830M/845G/852GM/855GM/865G/915G/945G support (EXPERIMENTAL)"
 	depends on FB && EXPERIMENTAL && PCI && X86
 	select AGP
 	select AGP_INTEL
@@ -817,7 +817,7 @@
 	select FB_CFB_IMAGEBLIT
 	help
 	  This driver supports the on-board graphics built in to the Intel
-          830M/845G/852GM/855GM/865G chipsets.
+          830M/845G/852GM/855GM/865G/915G/915GM/945G/945GM chipsets.
           Say Y if you have and plan to use such a board.
 
 	  If you say Y here and want DDC/I2C support you must first say Y to
@@ -830,6 +830,8 @@
 	  To compile this driver as a module, choose M here: the
 	  module will be called intelfb.
 
+	  For more information, please read <file:Documentation/fb/intelfb.txt>
+
 config FB_INTEL_DEBUG
 	bool "Intel driver Debug Messages"
 	depends on FB_INTEL