x86: minnowmax: Adjust VGA rom address

Adjust VGA rom address to 0xfffb0000 so that u-boot.rom image
can be built again.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/minnowmax_defconfig b/configs/minnowmax_defconfig
index fc2564c..d1332d3 100644
--- a/configs/minnowmax_defconfig
+++ b/configs/minnowmax_defconfig
@@ -6,6 +6,7 @@
 CONFIG_DEBUG_UART=y
 CONFIG_SMP=y
 CONFIG_HAVE_VGA_BIOS=y
+CONFIG_VGA_BIOS_ADDR=0xfffb0000
 CONFIG_GENERATE_PIRQ_TABLE=y
 CONFIG_GENERATE_MP_TABLE=y
 CONFIG_GENERATE_ACPI_TABLE=y
diff --git a/doc/README.x86 b/doc/README.x86
index c96a22c..92f4128 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -320,7 +320,7 @@
 6ef000   Environment         CONFIG_ENV_OFFSET
 6f0000   MRC cache           CONFIG_ENABLE_MRC_CACHE
 700000   u-boot-dtb.bin      CONFIG_SYS_TEXT_BASE
-790000   vga.bin             CONFIG_VGA_BIOS_ADDR
+7b0000   vga.bin             CONFIG_VGA_BIOS_ADDR
 7c0000   fsp.bin             CONFIG_FSP_ADDR
 7f8000   <spare>             (depends on size of fsp.bin)
 7ff800   U-Boot 16-bit boot  CONFIG_SYS_X86_START16