build: remove leftovers from previous x86 commits

VBoxManage is not used and the image is created with proper permisions:
0f5d0f6  image: use internal qemu-img for vmdk and vdi images drop host
         dependencies on qemu-utils and VirtualBox

Unreachable config symbols:
9e0759e  x86: merge all geode based subtargets into one

No need to define those symbols since x86_64 is subtarget of x86:
196fb76  x86: make x86_64 a subtarget instead of a standalone target

Unreachable config symbols, so remove GRUB_ROOT:
371b382  x86: remove the xen_domu subtarget

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

target/linux/x86/image/Makefile

@@ -15,7 +15,6 @@ GRUB_TERMINALS =
 GRUB_SERIAL_CONFIG =
 GRUB_TERMINAL_CONFIG =
 GRUB_CONSOLE_CMDLINE =
-GRUB_ROOT = hd0,msdos1
 
 USE_ATKBD = generic 64
 
@@ -48,10 +47,6 @@ ROOTPART:=$(if $(ROOTPART),$(ROOTPART),PARTUUID=$(SIGNATURE)-02)
 GRUB_TIMEOUT:=$(call qstrip,$(CONFIG_GRUB_TIMEOUT))
 GRUB_TITLE:=$(call qstrip,$(CONFIG_GRUB_TITLE))
 
-ifneq ($(CONFIG_TARGET_x86_xen_domu),)
-  GRUB_ROOT = xen/xvda,msdos1
-endif
-
 ifneq ($(CONFIG_GRUB_IMAGES),)
 
   BOOTOPTS:=$(call qstrip,$(CONFIG_GRUB_BOOTOPTS))
@@ -82,7 +77,6 @@ ifneq ($(CONFIG_GRUB_IMAGES),)
 		-e 's#@TERMINAL_CONFIG@#$(strip $(GRUB_TERMINAL_CONFIG))#g' \
 		-e 's#@CMDLINE@#$(strip $(call Image/cmdline/$(1)) $(BOOTOPTS) $(GRUB_CONSOLE_CMDLINE))#g' \
 		-e 's#@TIMEOUT@#$(GRUB_TIMEOUT)#g' \
-		-e 's#@ROOT@#$(GRUB_ROOT)#g' \
 		-e 's#@TITLE@#$(GRUB_TITLE)#g' \
 		./grub.cfg > $(KDIR)/root.grub/boot/grub/grub.cfg
 	-$(CP) $(STAGING_DIR_ROOT)/boot/. $(KDIR)/root.grub/boot/
@@ -135,8 +129,6 @@ ifneq ($(CONFIG_VDI_IMAGES),)
 	qemu-img convert -f raw -O vdi \
 		$(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).img \
 		$(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).vdi
-	# XXX: VBoxManage insists on setting perms to 0600
-	chmod 0644 $(BIN_DIR)/$(IMG_PREFIX)-combined-$(1).vdi
   endef
 endif
 

target/linux/x86/image/grub.cfg

@@ -3,7 +3,7 @@
 
 set default="0"
 set timeout="@TIMEOUT@"
-set root='(@ROOT@)'
+set root='(hd0,msdos1)'
 
 menuentry "@TITLE@" {
 	linux /boot/vmlinuz @CMDLINE@ noinitrd