kbuild: clean up *.dtb and *.dtb.S patterns from top-level Makefile

We need to add "clean-files" in Makfiles to clean up DT blobs, but we
often miss to do so.

Since there are no source files that end with .dtb or .dtb.S, so we
can clean-up those files from the top-level Makefile.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Herring <robh@kernel.org>

arch/mips/boot/dts/Makefile

@@ -18,4 +18,3 @@ dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(dtstree)/%.dts,%.dtb, $(foreach d,$(dt
 
 always		:= $(dtb-y)
 subdir-y	:= $(dts-dirs)
-clean-files	:= *.dtb *.dtb.S

arch/mips/boot/dts/brcm/Makefile

@@ -40,4 +40,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/cavium-octeon/Makefile

@@ -6,4 +6,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/img/Makefile

@@ -7,4 +7,3 @@ obj-$(CONFIG_MACH_PISTACHIO)	+= pistachio_marduk.dtb.o
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/ingenic/Makefile

@@ -7,4 +7,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/lantiq/Makefile

@@ -6,4 +6,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/mti/Makefile

@@ -7,4 +7,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/netlogic/Makefile

@@ -10,4 +10,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/ni/Makefile

@@ -4,4 +4,3 @@ dtb-$(CONFIG_FIT_IMAGE_FDT_NI169445)	+= 169445.dtb
 obj-					+= dummy.o
 
 always					:= $(dtb-y)
-clean-files				:= *.dtb *.dtb.S

arch/mips/boot/dts/pic32/Makefile

@@ -9,4 +9,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/qca/Makefile

@@ -9,4 +9,3 @@ dtb-$(CONFIG_ATH79)			+= ar9331_tl_mr3020.dtb
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/ralink/Makefile

@@ -11,4 +11,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files			:= *.dtb *.dtb.S

arch/mips/boot/dts/xilfpga/Makefile

@@ -6,4 +6,3 @@ obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))
 obj-				+= dummy.o
 
 always				:= $(dtb-y)
-clean-files	:= *.dtb *.dtb.S