x86: conga-qeval20-qa3-e3845: Adjust VGA rom address

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

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Stefan Roese <sr@denx.de>
Acked-by: Bin Meng <bmeng.cn@gmail.com>

configs/conga-qeval20-qa3-e3845-internal-uart_defconfig

@@ -6,6 +6,7 @@ CONFIG_INTERNAL_UART=y
 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