x86: dts: Remove coreboot_fb.dtsi

There is no need to keep a separate coreboot_fb.dtsi since now we
have a generic coreboot payload dts.

While we are here, this also remove the out-of-date description in
the documentation regarding to coreboot framebuffer driver with
U-Boot loaded as a payload from coreboot. As the testing result with
QEMU 2.5.0 shows, the driver just works like a charm.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/dts/bayleybay.dts b/arch/x86/dts/bayleybay.dts
index 9683c52..291dc07 100644
--- a/arch/x86/dts/bayleybay.dts
+++ b/arch/x86/dts/bayleybay.dts
@@ -15,7 +15,6 @@
 /include/ "reset.dtsi"
 /include/ "rtc.dtsi"
 /include/ "tsc_timer.dtsi"
-/include/ "coreboot_fb.dtsi"
 
 / {
 	model = "Intel Bayley Bay";
diff --git a/arch/x86/dts/chromebook_link.dts b/arch/x86/dts/chromebook_link.dts
index 115a088..f9f0979 100644
--- a/arch/x86/dts/chromebook_link.dts
+++ b/arch/x86/dts/chromebook_link.dts
@@ -8,7 +8,6 @@
 /include/ "reset.dtsi"
 /include/ "rtc.dtsi"
 /include/ "tsc_timer.dtsi"
-/include/ "coreboot_fb.dtsi"
 
 / {
 	model = "Google Link";
diff --git a/arch/x86/dts/chromebook_samus.dts b/arch/x86/dts/chromebook_samus.dts
index 9c48c9a..b58936b 100644
--- a/arch/x86/dts/chromebook_samus.dts
+++ b/arch/x86/dts/chromebook_samus.dts
@@ -8,7 +8,6 @@
 /include/ "reset.dtsi"
 /include/ "rtc.dtsi"
 /include/ "tsc_timer.dtsi"
-/include/ "coreboot_fb.dtsi"
 
 / {
 	model = "Google Samus";
diff --git a/arch/x86/dts/chromebox_panther.dts b/arch/x86/dts/chromebox_panther.dts
index a72a85e..f56e482 100644
--- a/arch/x86/dts/chromebox_panther.dts
+++ b/arch/x86/dts/chromebox_panther.dts
@@ -5,7 +5,6 @@
 /include/ "reset.dtsi"
 /include/ "rtc.dtsi"
 /include/ "tsc_timer.dtsi"
-/include/ "coreboot_fb.dtsi"
 
 / {
 	model = "Google Panther";
diff --git a/arch/x86/dts/coreboot_fb.dtsi b/arch/x86/dts/coreboot_fb.dtsi
deleted file mode 100644
index 7d72f18..0000000
--- a/arch/x86/dts/coreboot_fb.dtsi
+++ /dev/null
@@ -1,5 +0,0 @@
-/ {
-	coreboot-fb {
-		compatible = "coreboot-fb";
-	};
-};
diff --git a/arch/x86/dts/minnowmax.dts b/arch/x86/dts/minnowmax.dts
index 02ab4c1..6c65fb9 100644
--- a/arch/x86/dts/minnowmax.dts
+++ b/arch/x86/dts/minnowmax.dts
@@ -14,7 +14,6 @@
 /include/ "reset.dtsi"
 /include/ "rtc.dtsi"
 /include/ "tsc_timer.dtsi"
-/include/ "coreboot_fb.dtsi"
 
 / {
 	model = "Intel Minnowboard Max";
diff --git a/doc/README.x86 b/doc/README.x86
index 6015ca4..8cc4672 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -412,17 +412,10 @@
    - Set framebuffer graphics resolution (1280x1024 32k-color (1:5:5))
    - Keep VESA framebuffer
 
-And include coreboot_fb.dtsi in your board's device tree source file, like:
-
-   /include/ "coreboot_fb.dtsi"
-
 At present it seems that for Minnowboard Max, coreboot does not pass through
 the video information correctly (it always says the resolution is 0x0). This
 works correctly for link though.
 
-Note: coreboot framebuffer driver does not work on QEMU. The reason is unknown
-at this point. Patches are welcome if you figure out anything wrong.
-
 Test with QEMU for bare mode
 ----------------------------
 QEMU is a fancy emulator that can enable us to test U-Boot without access to