build: convert HAS_ARM_HDLCD use to Kconfig

Use the Kconfig generated CONFIG_HAS_ARM_HDLCD defines in the code base.

Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

xen/arch/arm/Kconfig

@@ -16,6 +16,7 @@ config ARM_64
 
 config ARM
 	def_bool y
+	select HAS_ARM_HDLCD
 	select HAS_DEVICE_TREE
 	select HAS_PASSTHROUGH
 	select HAS_PDX

xen/arch/arm/Rules.mk

@@ -6,8 +6,6 @@
 # 'make clean' before rebuilding.
 #
 
-HAS_ARM_HDLCD := y
-
 CFLAGS += -I$(BASEDIR)/include
 
 $(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS))

xen/drivers/video/Kconfig

@@ -7,3 +7,7 @@ config HAS_VIDEO
 config HAS_VGA
 	bool
 	select HAS_VIDEO
+
+# Select HAS_ARM_HDLCD if ARM HDLCD is supported
+config HAS_ARM_HDLCD
+	bool

xen/drivers/video/Makefile

@@ -4,4 +4,4 @@ obj-$(CONFIG_HAS_VIDEO) += font_8x16.o
 obj-$(CONFIG_HAS_VIDEO) += font_8x8.o
 obj-$(CONFIG_HAS_VIDEO) += lfb.o
 obj-$(CONFIG_HAS_VGA) += vesa.o
-obj-$(HAS_ARM_HDLCD) += arm_hdlcd.o
+obj-$(CONFIG_HAS_ARM_HDLCD) += arm_hdlcd.o