Split target/Config.in.arch into multiple Config.in.* in arch/

target/Config.in.arch had become too long, and we want to remove the
target/ directory. So let's move it to arch/ and split it this way:

 * An initial Config.in that lists the top-level architecture, and
   sources the arch-specific Config.in.<arch> files, as well as
   Config.in.common (see below)

 * One Config.in.<arch> per architecture, listing the CPU families,
   ABI choices, etc.

 * One Config.in.common that defines the gcc mtune, march, mcpu values
   and other hidden options.

[Peter: space->tab fix, mipsel64 little endian, mips3 as noted by Arnout]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

arch/Config.in.sparc

@@ -0,0 +1,38 @@
+choice
+	prompt "Target Architecture Variant"
+	depends on BR2_sparc
+	default BR2_sparc_v7
+	help
+	  Specific CPU variant to use
+
+config BR2_sparc_v7
+	bool "v7"
+config BR2_sparc_cypress
+	bool "cypress"
+config BR2_sparc_v8
+	bool "v8"
+config BR2_sparc_sparchfleon
+	bool "hfleon"
+config BR2_sparc_sparchfleonv8
+	bool "hfleonv8"
+config BR2_sparc_sparcsfleon
+	bool "sfleon"
+config BR2_sparc_sparcsfleonv8
+	bool "sfleonv8"
+config BR2_sparc_supersparc
+	bool "supersparc"
+config BR2_sparc_sparclite
+	bool "sparclite"
+config BR2_sparc_f930
+	bool "f930"
+config BR2_sparc_f934
+	bool "f934"
+config BR2_sparc_hypersparc
+	bool "hypersparc"
+config BR2_sparc_sparclite86x
+	bool "sparclite86x"
+config BR2_sparc_sparclet
+	bool "sparclet"
+config BR2_sparc_tsc701
+	bool "tsc701"
+endchoice