ARM: 8895/1: visit mach-* and plat-* directories when cleaning

When you run "make clean" for arm, it never visits mach-* or plat-*
directories because machine-y and plat-y are just empty.

When cleaning, all machine, plat directories are accumulated to
machine-, plat-, respectively. So, let's pass them to core- to
clean up those directories.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

arch/arm/Makefile

@@ -285,6 +285,10 @@ core-y				+= arch/arm/net/
 core-y				+= arch/arm/crypto/
 core-y				+= $(machdirs) $(platdirs)
 
+# For cleaning
+core-				+= $(patsubst %,arch/arm/mach-%/, $(machine-))
+core-				+= $(patsubst %,arch/arm/plat-%/, $(plat-))
+
 drivers-$(CONFIG_OPROFILE)      += arch/arm/oprofile/
 
 libs-y				:= arch/arm/lib/ $(libs-y)