Bump buidlroot version to 2018.02.6

bsp/buildroot/board/qemu/xtensa-lx60/linux-4.11-nommu.config

@@ -6,10 +6,11 @@ CONFIG_XTENSA_VARIANT_CUSTOM_NAME="dc233c"
 # CONFIG_XTENSA_VARIANT_MMU is not set
 CONFIG_XTENSA_UNALIGNED_USER=y
 CONFIG_PREEMPT=y
+CONFIG_KERNEL_LOAD_ADDRESS=0x00003000
 # CONFIG_PCI is not set
 CONFIG_XTENSA_PLATFORM_XTFPGA=y
 CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8"
+CONFIG_CMDLINE="earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 memmap=0x04000000@0"
 CONFIG_DEFAULT_MEM_START=0x00000000
 CONFIG_BINFMT_FLAT=y
 CONFIG_NET=y

bsp/buildroot/board/qemu/xtensa-lx60/linux-4.11.config

@@ -5,7 +5,7 @@ CONFIG_XTENSA_VARIANT_DC233C=y
 CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX=y
 CONFIG_XTENSA_PLATFORM_XTFPGA=y
 CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=ttyS0,38400"
+CONFIG_CMDLINE="console=ttyS0,38400 memmap=0x04000000@0"
 # CONFIG_COMPACTION is not set
 # CONFIG_BOUNCE is not set
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set

bsp/buildroot/board/qemu/xtensa-lx60/linux/linux-0001-disable-redboot-and-uboot.patch

@@ -1,16 +0,0 @@
-disable boot-uboot and boot-redboot, requires a patched u-boot and mkimage
-
-Signed-off-by:Waldemar Brodkorb <wbx@openadk.org>
-
-diff -Nur linux-3.15.orig/arch/xtensa/boot/Makefile linux-3.15/arch/xtensa/boot/Makefile
---- linux-3.15.orig/arch/xtensa/boot/Makefile	2014-06-08 20:19:54.000000000 +0200
-+++ linux-3.15/arch/xtensa/boot/Makefile	2014-06-14 20:07:15.206091165 +0200
-@@ -23,7 +23,7 @@
- 
- bootdir-$(CONFIG_XTENSA_PLATFORM_ISS)	 += boot-elf
- bootdir-$(CONFIG_XTENSA_PLATFORM_XT2000) += boot-redboot boot-elf boot-uboot
--bootdir-$(CONFIG_XTENSA_PLATFORM_XTFPGA) += boot-redboot boot-elf boot-uboot
-+bootdir-$(CONFIG_XTENSA_PLATFORM_XTFPGA) += boot-elf
- 
- zImage Image: $(bootdir-y)
- 

bsp/buildroot/board/qemu/xtensa-lx60/readme.txt

@@ -4,5 +4,4 @@ Run the emulation with:
 
 The login prompt will appear in the terminal that started Qemu.
 
-Tested with QEMU 2.6.0
-Known to fail with 2.5.0
+Tested with QEMU 2.9.0