MIPS: ath79: Remove the builtin DTB support

Now that appended DTB is usable we can drop the builtin DTB support.

Signed-off-by: Alban Bedel <[e-mail]>
Cc: Felix Fietkau <[e-mail]>
Cc: Antony Pavlov <[e-mail]>
Cc: Gabor Juhos <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/12231/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/ath79/Kconfig

···
 	  Say 'Y' here if you want your kernel to support the
 	  Ubiquiti Networks XM (rev 1.0) board.
 
-choice
-	prompt "Build a DTB in the kernel"
-	optional
-	help
-	  Select a devicetree that should be built into the kernel.
-
-	config DTB_TL_WR1043ND_V1
-		bool "TL-WR1043ND Version 1"
-		select BUILTIN_DTB
-		select SOC_AR913X
-endchoice
-
 endmenu
 
 config SOC_AR71XX

arch/mips/ath79/setup.c

···
 		__dt_setup_arch((void *)KSEG0ADDR(fdt_start));
 	else if (fw_arg0 == -2)
 		__dt_setup_arch((void *)KSEG0ADDR(fw_arg1));
-#ifdef CONFIG_BUILTIN_DTB
-	else
-		__dt_setup_arch(__dtb_start);
-#endif
 
 	ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
 					   AR71XX_RESET_SIZE);

arch/mips/boot/dts/qca/Makefile

···
 # All DTBs
 dtb-$(CONFIG_ATH79)			+= ar9132_tl_wr1043nd_v1.dtb
 
-# Select a DTB to build in the kernel
-obj-$(CONFIG_DTB_TL_WR1043ND_V1)	+= ar9132_tl_wr1043nd_v1.dtb.o
-
 # Force kbuild to make empty built-in.o if necessary
 obj-				+= dummy.o